JP2013168919A - Telephone speech conversion system and method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a speech path connecting a call-source telephone set and a call destination telephone based upon speech quality.SOLUTION: A telephone speech conversion system includes a plurality of line modules which convert speech data from respective telephone sets into time-divided speech data, a switch module which performs speech exchange between specific line modules, and a main control module which manages the respective line modules and the switch module. The main control module specifies the type and position of a call source telephone set as a call source and performs call control over the specified call source telephone set when receiving a call request from the telephone set, and specifies a telephone set as a call destination, specifies an issue destination of a speech connection path connection request, and outputs the speech connection path connection request to the specified issue destination when receiving dial information from the call source telephone set. The issue destination having received the speech connection path connection request forms a speech path connecting the call source telephone set and the call destination telephone set.

Description

  The present invention relates to a voice communication system and a method therefor having a voice data transmission path for transmitting packetized voice data between a public switched telephone network and an IP (Internet Protocol) telephone network.

  In recent years, voice communication via the IP telephone network has become the mainstream as the speed of communication networks increases. At this time, it has a gateway function for performing communication protocol conversion between a public switched telephone network (hereinafter sometimes referred to as a telephone network) and an IP telephone network (hereinafter sometimes referred to as an IP network). An IP communication interface device that realizes various types of communication such as voice communication and data communication between a public switched telephone network and an IP telephone network has been proposed (see Patent Document 1). In addition, as an IP communication system that enables replacement from the fixed telephone network to the IP telephone network, communication between terminals accommodated in the fixed telephone network and the IP telephone network and between terminals accommodated in the IP telephone network There has been proposed an IP communication system that performs communication in parallel with each other (see Patent Document 2).

JP 2001-186193 A JP 2010-263359 A

  When building a system that integrates a telephone network and an IP network, depending on the user, there are cases where the telephone network is the main component and the IP network is not required, or a small-scale system is required even if the IP network is required. In addition, there are various cases where the IP network is mainly used and a telephone network is not required or a small-scale system is constructed even if a telephone network is required.

  Also, when transmitting RTP (Realtime Transport Protocol) packetized voice data over the communication path between the telephone network and the IP network, the voice data is not always transmitted at regular intervals, and the transmission distance Causes an indeterminate delay. In order to reproduce the audio data that arrives in such a manner, it is necessary to return the received audio data to a certain sampling period (for example, 8 kHz), and it is necessary to process after accumulating a certain amount of audio data Because there is a big delay. This can be an echo that can degrade voice quality.

  Therefore, in consideration of transmitting RTP packetized voice data to the communication path between the telephone network and the IP network, even if the method described in Patent Document 1 or Patent Document 2 is adopted, Degradation of voice quality cannot be prevented. That is, the method described in Patent Document 1 or Patent Document 2 can construct a system that mainly converts or replaces the telephone network into the IP network with the IP network as the main axis. However, using only the communication path interposed between the telephone network and the IP network cannot prevent voice quality deterioration.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is call voice exchange capable of forming a voice path connecting a caller telephone and a callee telephone on the basis of voice quality. A system and method are provided.

  In order to achieve the above object, the present invention is connected to an IP telephone network through a voice data transmission path for transmitting packetized voice data, and is connected to at least a plurality of telephones or a public switched telephone network. A plurality of line modules connected to a plurality of office lines and converting voice data from each telephone into time-division voice data; and connected to the voice data transmission path and each line module; A switch module for exchanging voice between specified line modules, and a module connected to the voice data transmission path, wherein the types and positions of the telephones correspond to the call requests from the telephones. Telephone information, number information in which the telephone number of each telephone is associated with dial information from each telephone, and each telephone Each line module, and a main control module that manages at least the switch module as a management target, based on management information including call control information for controlling, the main control module from the telephone When a call request is received, a type and a position of a caller telephone serving as a caller are identified based on the received call request and the telephone information, and the caller telephone is identified based on the call control information. When call control is executed and dial information is received from the caller telephone, a callee telephone serving as a callee of the caller telephone is identified based on the received dial information and the number information, and the management information Based on the management information related to the identified caller telephone and the callee telephone, the voice connection path connection request issuance destination is identified, and the sound is transmitted to the identified issuer. The issuance destination that outputs the voice connection path connection request and receives the voice connection path connection request is at least a voice path that connects the caller telephone and the callee telephone based on the received voice connection path connection request. It is characterized by forming a part.

  According to the present invention, it is possible to form a voice path connecting a caller telephone and a callee telephone on the basis of voice quality.

1 is an overall configuration diagram of a call voice exchange system. It is a block diagram for demonstrating allocation of the time switch which performs the audio | voice exchange between different modules. It is a block diagram for demonstrating the connection system of the time switch in a line module. It is a block diagram for demonstrating the connection system of the time switch in a switch module. It is a block diagram for demonstrating the operation | movement at the time of dial pulse local line transmission from the analog telephone between the same line modules in the same base. It is a call control operation sequence for explaining an operation when dial pulse line transmission is performed from an analog telephone set between the same line modules in the same base. It is a block diagram for explaining an incoming / outgoing call between IP telephones in the same base. It is a call control operation sequence for explaining outgoing and incoming calls between IP telephones in the same base. It is a block diagram for explaining dial pulse outgoing / incoming calls of analog telephones between different line modules in the same base. It is a call control operation sequence for explaining dial pulse outgoing / incoming calls of analog telephones between different line modules in the same base. FIG. 5 is a configuration diagram for explaining an operation when a telephone call is made from an analog telephone set between different line modules in the same base to an IP telephone using a PB dial. It is a call control operation sequence for explaining an operation when talking with an IP telephone by PB dial from an analog telephone between different line modules in the same base. It is a call control operation sequence for explaining an operation when talking with an IP telephone by PB dial from an analog telephone between different line modules in the same base. It is a block diagram for demonstrating the dial pulse outgoing / incoming call of the analog telephone between the different line modules of a different base, Comprising: It is a block diagram of a center base. It is a block diagram for explaining dial pulse outgoing / incoming calls of analog telephones between different line modules at different sites, and is a configuration diagram of a remote site. It is a call control operation sequence for explaining dial pulse outgoing / incoming calls of analog telephones between different line modules at different bases. It is a block diagram for demonstrating the dial pulse outgoing / incoming call of the analog telephone between the line modules between different bases, Comprising: It is a block diagram of a center base. It is a block diagram for demonstrating the dial pulse outgoing / incoming call of the analog telephone between the line modules between different bases, Comprising: It is a block diagram of a remote base. It is a call control operation sequence for explaining dial pulse outgoing and incoming calls of analog telephones between line modules between different bases. It is a block diagram for demonstrating the operation | movement at the time of carrying out a local line transmission by the PB dial from the analog telephone between the different line modules between different bases, Comprising: It is a block diagram for demonstrating the operation | movement at the time of carrying out a local line transmission by the PB dial from the analog telephone between the different line modules between different bases, Comprising: It is a block diagram of a remote base. It is a call control operation sequence for explaining an operation when a local line is transmitted by PB dial from an analog telephone set between different line modules between different bases. It is a call control operation sequence for explaining an operation when a local line is transmitted by PB dial from an analog telephone set between different line modules between different bases. It is the block diagram which duplexed the telephone call voice exchange system. It is the block diagram which duplexed the telephone call voice exchange system. It is a block diagram for demonstrating switching of the audio | voice data transmission path at the time of duplication. It is a sequence for demonstrating switching of the IP address at the time of duplication. It is a block diagram for explaining dial pulse local line transmission operation from analog telephones between the same line modules in a duplexed voice exchange system. It is a block diagram for explaining dial pulse local line transmission operation from analog telephones between the same line modules in a duplexed voice exchange system. It is a call control operation sequence for explaining the dial pulse office line transmission operation from the analog telephone between the same line modules in the duplexed voice exchange system. FIG. 6 is a configuration diagram for explaining an operation when a telephone call is made from an analog telephone set between different line modules to a IP telephone set by PB dialing in a duplexed call voice exchange system. FIG. 6 is a configuration diagram for explaining an operation when a telephone call is made from an analog telephone set between different line modules to a IP telephone set by PB dialing in a duplexed call voice exchange system. 5 is a call control operation sequence for explaining an operation when a telephone call is made from an analog telephone set between different line modules to an IP telephone using a PB dial in a duplexed voice exchange system. 5 is a call control operation sequence for explaining an operation when a telephone call is made from an analog telephone set between different line modules to an IP telephone using a PB dial in a duplexed voice exchange system. 5 is a call control operation sequence for explaining an operation when a telephone call is made from an analog telephone set between different line modules to an IP telephone using a PB dial in a duplexed voice exchange system. It is a block diagram for demonstrating the operation | movement of the dial pulse outgoing / incoming call of the analog telephone between different line modules in the duplexed voice exchange system. It is a block diagram for demonstrating the operation | movement of the dial pulse outgoing / incoming call of the analog telephone between different line modules in the duplexed voice exchange system. It is a call control operation sequence for explaining the operation of a dial pulse outgoing / incoming call of an analog telephone between different line modules in a duplexed voice exchange system. It is a call control operation sequence for explaining the operation of a dial pulse outgoing / incoming call of an analog telephone between different line modules in a duplexed voice exchange system.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an overall configuration diagram of a call voice exchange system in the first embodiment. In FIG. 1, the call voice exchange system includes a main control module 101, a LAN (Local Area Network) 104, an IP network 105, a switch module 106, a # 1 line module 109, and a # 2 line module 118. , And a plurality of IP telephones 126 and 1127 constituting the IP terminal. The main control module 101, the switch module 106, the line modules 109 and 118, the IP network 105, and the IP telephones 126 and 127 are connected to the LAN 104, respectively.

  The line module 109 is connected to a plurality of analog telephones 115 constituting an extension telephone and a plurality of office lines 117 connected to a telephone network (public switched telephone network), and the line module 118 constitutes an extension telephone. A plurality of analog telephones 125 are connected.

  The main control module 101 is a module that performs overall control of the entire call voice exchange system, and may be referred to as a central control device (hereinafter also referred to as CC) 102 and a signal processing device (hereinafter referred to as SC). ) 103.

  The CC 102 manages the types and positions of analog telephones (hereinafter also referred to as telephones) 115 and 125 or IP telephones 126 and 127, and manages the telephone numbers of the telephones 115 and 125 and the IP telephones 126 and 127. .

  Here, the type of telephone is whether the telephone is an analog telephone that transmits dial pulses, a PB dial type analog telephone that is a PB dial, or an IP telephone. It is information that specifies. Further, the position of the telephone is information for specifying whether the position where the analog telephone or the IP telephone is located is a center base or a remote base.

  The SC 103 converts various information such as call control information into signals that can be transmitted and received by the CC 102. For example, the SC 103 converts various types of information such as call control information into signals and information that can be transmitted on the LAN 104 and converts the signals and information on the LAN 104 into information that can be identified by the CC 102. At this time, the main control module 101 collects and controls the incoming and outgoing calls of the telephones 115 and 125 and the IP telephones 126 and 127 by the processing of the CC 102 and SC 103.

  For example, the main control module 101 determines that the type and position of each telephone such as the telephones 115 and 125, the IP telephones 126 and 127, the telephone information associated with the call request from each telephone, and the telephone number of each telephone. Based on management information including number information associated with dial information from each telephone and call control information for controlling each telephone, at least the line modules 109 and 118 and the switch module 106 are managed. Manage as a target.

  At this time, when receiving a call request from the telephone, the main control module 101 identifies the type and location of the caller telephone serving as the caller based on the received call request and telephone information, and based on the call control information. If the call control is performed on the caller telephone specified in Step 2 and dial information is received from the caller telephone, the callee telephone that is the callee of the caller telephone is identified and managed based on the received dial information and number information. Based on the management information related to the specified caller telephone and the callee telephone among the information, the voice connection path connection request issue destination is specified, and the voice connection path connection request is output to the specified issue destination.

  In this case, the issue destination that has received the voice connection path connection request, for example, each of the line modules 109 and 118 or the switch module 106, connects the call source telephone and the call destination telephone based on the received voice connection path connection request. The process for forming at least a part of is performed.

  The LAN 104 is a communication path interposed between the IP network 105 and the telephone network, and constitutes packetized call control information and packetized voice data. On the LAN 104, packetized call control information and packetized PCM voice data are transmitted.

  The switch module 106 includes a time switch signal processing device (hereinafter also referred to as TWSSC) 107 and a time switch (hereinafter also referred to as TSW) 108.

  The TSWSC 107 converts the call control information packetized on the LAN 104 into a signal that can be transmitted and received by the TSW 108. The TSW 108 is connected to the line module 109 and the line module 118, and is a call path connecting the line module 109 and the line module 118 based on a signal from the TSWSC 107, and is a transmission path of time-division multiplexed PCM voice data ( Perform voice exchange to switch channels. Here, voice exchange means switching transmission paths (channels) of time-division multiplexed PCM voice data.

  The line module 109 includes a packet unit (hereinafter may be referred to as PU) 110, a sound generator (hereinafter also referred to as TG) 111, a TSW 112, and a module controller (hereinafter referred to as MCNT). 113), an extension circuit (hereinafter sometimes referred to as LIN) 114, and a local circuit (hereinafter sometimes referred to as COT) 116. The PU 110 is connected to the LAN 104, the LIN 114 is connected to the telephone 115, and the COT 116 is connected to the office line 117.

  The PU 110 is connected to the TSW 112 and the MCNT 113 and converts the packetized call control information and PCM voice data on the LAN 104 into signals that can be transmitted and received within the line module 109.

The TG 111 generates a sound source such as a dial tone and a ringing tone that is heard from the telephone 115.
The TSW 112 is connected to the TG 111, the TSW 108, and the MCNT 113, and performs voice exchange for switching a transmission path (channel) for transmitting time-division multiplexed PCM voice data.

  The MCNT 113 exchanges time-division multiplexed PCM audio data with the TSW 112, and also exchanges call control information with the PU 110, and further exchanges call control information or time-division multiplexed PCM audio data with the LIN 114 or COT 116. Do.

  The LIN 114 is connected to a plurality of telephones 115 and functions as a line interface that exchanges various signals and information with the telephones 115, and converts analog voice and time-divided PCM voice data.

  The COT 116 is connected to a plurality of office lines 117 connected to a telephone network (public switched telephone network), functions as a line interface for transmitting / receiving various signals and various information to / from each office line 117, and is time-divided with analog voice. Converts PCM audio data.

  The line module 118 includes a PU 119, a TG 120, a TSW 121, an MCNT 122, a push button receiver (hereinafter sometimes referred to as PBR) 123, and a LIN 124.

  The line module 118 has a PBR 123 disposed in place of the COT 116, and the other configuration is the same as that of the line module 109. When a PB dial type analog telephone is connected to one of the line modules 109 and 118 and the PBR 123 receives a push button signal by a PB (push button) dial from the MCNT 122, the PBR 123 receives a push button signal (PB signal). ) Is converted into dial information, and the converted dial information is output to the MCNT 122. At this time, the configuration can be simplified by arranging the PBR 123 only in the line module 118 instead of arranging the PBR 123 in all the line modules 109 and 118.

  IP telephones 126 and 127 are configured as telephones that directly transmit and receive packetized call control information and packetized PCM voice data on LAN 104.

  In the system shown in FIG. 1, two line modules 109 and 118 are provided as line modules. However, the number of line modules is not limited to two, and three or more line modules can be provided according to the scale of the system. At this time, the line modules are connected to each other via the switch module 106.

  Next, FIG. 2 shows a configuration diagram of a time switch for performing voice exchange between different modules. In FIG. 2, channels 201 of # 0 to # 255 are built in the TSW 112 in the line module 109, and telephones 115 to 117 are assigned to the channels 201, respectively. Similarly, channels 202 of # 0 to # 255 are constructed in the TSW 121 in the line module 118, and PBR 123 to telephone 125 are assigned to each channel 202.

  In addition, channels # 0 to #n are constructed in the TSW 108 in the switch module 106. Of the channels 203 from # 0 to #n, the channels 203 from # 0 to # 255 are allocated to the TSW 112, and the channels 203 from # 256 to # 511 are allocated to the TSW 121.

  At this time, each channel 201 in the TSW 112 is connected to any one of the channels 203 of # 0 to # 255. Each channel 202 in the TSW 121 is connected to any one of the channels 203 of # 256 to # 511. Further, among the channels 203 in the TSW 108, the channels 203 of # 0 to # 255 are exchanged with the channels 203 of # 256 to # 511. At this time, by managing the maximum number of channels of one line module as an expansion unit, a switching system having a physical scale corresponding to the number of lines used by the user can be provided.

  Since TSWs 108, 112, and 121 handle time-division multiplexed PCM voice data, the channels of TSWs 108, 112, and 121 are assigned to IP telephones 126 and 127 that handle RTP packetized PCM voice data. Absent.

  Next, FIG. 3 shows a configuration diagram for explaining a connection system of time switches in the line module. In FIG. 3, the TSW 112 includes an incoming channel 301 of # 0 to # 255, a time switch 302, an outgoing channel 303 of # 0 to # 255, and a selector 304 of # 0 to # 255.

  Each input channel 301 has an input side connected to the telephone 115 via the LIN 114 or is connected to the office line 117 via the COT 116, and an output side connected to the time switch 302, the TSW 108, and the PU 110. Each incoming channel 301 outputs voice data from the telephone 115 or the office line 117. At this time, a path 305 is formed between each incoming channel 301 and the time switch 302, a path 306 is formed between each incoming channel 301 and the TSW 108, and between each incoming channel 301 and the PU 110, A path 307 is formed.

  The time switch 302 performs voice exchange for switching the transmission path (channel) of PCM voice data input from each incoming channel 301, and outputs the voice-exchanged PCM voice data to each outgoing channel 303. PCM audio data output from each output channel 303 is input to each selector 304.

  A path 308 is formed between each selector 304 and each output channel 303, a path 309 is formed between each selector 304 and the TSW 108, and a path 310 is formed between each selector 304 and the PU 110. Is formed. Each selector 304 selects PCM audio data from any one of the PCM audio data transmitted through each path 308, 309, 310, and sends the selected PCM audio data to the LIN 114 or COT 116 via the MCNT 113. Output. At this time, each selector 304 selects PCM voice data from the path 308 when forming a call path in the line module 109, and when forming a call path between the line module 109 and the line module 118, the path When PCM voice data from 309 is selected and the LAN 104 is used as a call path, PCM voice data from the path 310 is selected.

  Next, FIG. 4 shows a configuration diagram for explaining a connection system of time switches in the switch module. In FIG. 4, the TSW 108 includes an incoming channel 401 of # 0 to #n, a time switch 402, and an outgoing channel 403 of # 0 to #n. The incoming channels # 0 to # 255 are connected to the TSW 112 of the line module 109, and the incoming channels 401 of # 256 to # 511 are connected to the TSW 121 of the line module 118. Each incoming channel 401 receives PCM audio data input from the TSW 112 of the line module 109 or the TSW 121 of the line module 118, and outputs the input PCM audio data to the time switch 402. The time switch 402 performs voice exchange of the PCM voice data input from each incoming channel 401 and outputs the PCM voice data subjected to voice exchange to each outgoing channel 403. Each outgoing channel 403 outputs the PCM voice data input from the time switch 402 to the TSW 121 of the line module 118 or the TSW 112 of the line module 109.

  Next, the operation of outgoing / incoming call in the present embodiment will be described with reference to the block diagram of FIG.

  First, when the telephone 115 connected to the line module 109 is off-hooked (601) and an off-hook signal is output from the telephone 115, a call request (602) is sent from the LIN 114 via the path 501 to the MCNT 113, PU 110, LAN 104, SC 103. Via CC102.

  Upon receiving the call request (602), the CC 102 transmits a dial tone transmission request (603) via the path 502 to the TSW 112 via the SC 103, the LAN 104, and the PU 110. The TSW 112 that has received the dial tone transmission request (603) connects the path 504. As a result, a dial tone is transmitted from the TG 111 to the telephone 115 via the TSW 112, MCNT 113, and LIN 114 (604).

  Next, when a dial (605) originating from the office line is generated from the telephone 115, dial information (606) is sent from the LIN 114 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 via the path 501. The CC 102 that has received the dial information (606) transmits a dial tone stop request (607) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via the path 502. The TSW 112 that has received the dial tone stop request (607) disconnects the path 504. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 transmits a voice path connection request (608) on the path 502 to the TSW 112 via the SC 103, the LAN 104, and the PU 110. Receiving the voice path connection request (608), the TSW 112 connects the voice path constituted by the path 505 between the LIN 114, the MCNT 113, the TSW 112, the MCNT 113, and the COT 116 (609).

  Next, the CC 102 transmits a call request (610) on the path 503 to the COT 116 via the SC 103, the LAN 104, the PU 110, and the MCNT 113. The COT 116 that has received the call request (610) captures the office line 117 (611). As a result, the voice path connecting the telephone 115 and the office line 117 is connected (612). That is, a voice connection path connecting the caller and the callee is formed, and a voice call can be made between the telephone set 115 and the office line 117.

  This voice call can be performed only by voice exchange of the TSW 112 in one line module 109. The voice data used for this voice call is time-division multiplexed PCM voice data and not RTP packetized PCM voice data. Therefore, the voice quality is prevented from deteriorating and the voice quality is maintained in an optimum state. can do.

  Next, the operation of outgoing / incoming call of the IP telephone in the same base as the main control module will be described according to the configuration diagram of FIG. 7 and the call control operation sequence of FIG.

  First, when the IP telephone 126 is off-hook (801), a call request (802) is transmitted from the IP telephone 126 to the CC 102 via the LAN 104 and SC 103 via the path 701. The CC 802 that has received the call request (802) transmits a dial tone transmission request (804) via the path 701 to the IP telephone 126 via the SC 103 and the LAN 104. As a result, a dial tone is output from the IP telephone 126 (803).

  Next, when dialing (805) is performed by the IP telephone 126, dial information (806) is transmitted from the IP telephone 126 to the CC 102 via the LAN 104 and the SC 103 via the path 701. The CC 102 that has received the dial information (806) transmits a call request (807) via the path 702 to the IP telephone 126 via the SC 103 and the LAN 104. As a result, the bell is ringed by the IP telephone 127 (807).

  Next, when the IP telephone 127 is off-hook (810), a response request (809) is transmitted from the IP telephone 127 to the CC 102 via the LAN 104 and SC 103 via the path 702.

  The CC 102 that has received the response request (809) transmits a voice path connection request (811) to the IP telephone 126 via the SC 103 and the LAN 104 on the route 701. Also, the CC 102 transmits a voice path connection request (812) to the IP telephone 127 via the SC 103 and the LAN 104 on the route 702. As a result, a voice path by the path 703 is connected between the IP telephone 126 and the IP telephone 127 (813), and a voice call between the IP telephone 126 and the IP telephone 127 becomes possible.

  This voice call is a call connected only between IP telephones. The voice data used for this call is PCM voice data that is RTP-packetized, so the voice quality may deteriorate.

  Next, the operation of dial pulse outgoing / incoming calls of analog telephones between different line modules in the same base will be described according to the configuration diagram of FIG. 9 and the call control operation sequence of FIG.

  First, when the telephone 115 is off-hook (1001), a call request (1002) is transmitted from the LIN 115 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 via the route 901. The CC 102 that has received the call request (1002) transmits a dial tone transmission request (1003) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via the path 902. The TSW 112 that has received the dial tone transmission request (1003) connects the path 906. As a result, a dial tone is transmitted from the TG 111 to the telephone 115 via the TSW 112, MCNT 113, and LIN 114 (1004).

  Next, when dialing (1005) is performed by the telephone 115, dial information (1006) is transmitted from the LIN 114 to the CC 102 via the MCNT 113, PU 110, LAN 104, and SC 103 via the route 901. The CC 102 that has received the dial information (1006) transmits a dial tone stop request (1007) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the route 902. The TSW 112 that has received the dial tone stop request (1007) disconnects the path 906. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 transmits a call request (1008) to the telephone set 125 via the SC 103, the LAN 104, the PU 119, the MCNT 122, and the LIN 124 on the path 903. As a result, the bell is ringed by the telephone 125 (1009).

  Subsequently, the CC 100 transmits a ringing tone transmission request (1010) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 902. Receiving the ringing tone transmission request (1010), the TSW 112 connects the path 906. As a result, a ringing tone is transmitted from the TG 111 to the telephone set 115 via the TSW 112, MCNT 113, and LIN 114 (1011).

  Next, when the telephone 125 is off-hook (1012), a response request (1013) is transmitted from the LIN 124 to the CC 102 via the MCNT 122, the PU 119, the LAN 104, and the SC 103 via the path 903.

  The CC 102 that has received the response request (1013) transmits a ringing tone stop request (1014) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via the path 902. The TSW 112 that has received the ringing tone transmission request (1010) disconnects the path 906. As a result, the ringing tone that has been transmitted is stopped.

  Subsequently, the CC 102 transmits a voice path connection request (1015) on the route 905 to the TSW 108 via the SC 103, LAN 104, and TWSSC 107, and sends a voice path connection request (116) on the SC 103, LAN 104 on the route 902. , Transmit to the TSW 112 via the PU 110. Further, the CC 102 transmits a voice path connection request (1017) to the TSW 121 via the SC 103, the LAN 104, and the PU 119 on the route 904. Receiving each voice path connection request, the TSW 108, 112, 121 connects the voice path of the route 907 with the entire time switch (1018). As a result, a voice call can be made between the telephone 115 and the telephone 125.

  The voice data used for this voice call is voice data that is exchanged between different line modules by the TSW 108 in the switch module 106, and is PCM voice data that is time-division multiplexed. For this reason, in this voice call, the voice quality can be maintained in an optimum state.

  Next, referring to the configuration diagram of FIG. 11 and the call control operation sequence of FIG. 12 and FIG. 13, the operation of outgoing / incoming calls when talking to an IP phone by PB dial from an analog phone between different line modules in the same base It explains according to.

  First, when the telephone 115 is off-hook (1201), a call request (1202) is transmitted from the LIN 114 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 via the route 1101. The CC 102 that has received the call request captures the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 1103 (1203).

  Subsequently, the CC 102 transmits a push button signal voice path connection request (1204) to the TSW 108 via the SC 103, the LAN 104, and the TWSSC 107 on the route 1105 on the condition that the PBR 123 is captured. , Push button signal voice path connection request (1205) is transmitted to TSW 112 via SC 103, LAN 104, and PU 110. Further, the CC 102 transmits a push button signal voice path connection request (1206) to the TSW 121 via the SC 103, the LAN 104, and the PU 119 on the route 1104.

  The TSWs 108, 112, and 121 that have received each push button signal voice path connection request connect the PB signal transmission voice path of the path 1108 with the entire time switch (1209). As a result, the PB signal can be transmitted from the telephone 115 to the PBR 123.

  Next, the CC 102 sends a PB reception request (1207) to the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 1103.

  Subsequently, CC 102 transmits a dial tone transmission request (1208) to TSW 112 via SC 103, LAN 104, and PU 110 on path 1102. The TSW 112 that has received the dial tone transmission request connects the path 1107. Thereby, a dial tone is transmitted from the TG 111 to the telephone set 115 via the TSW 112, the MCNT 113, and the LIN 114 (1207).

  Next, when PB dialing (1208) is performed by the telephone set 115, a PB signal based on PCM voice data time-division multiplexed to the PBR 123 is transmitted from the telephone set 115 to the PBR 123 via the path 1108 (1209). The PBR 123 that has received the PB signal converts the received PB signal into dial information, and transmits the converted dial information to the CC 102 via the MCNT 122, PU 119, LAN 104, and SC 103 via the path 1003. The CC 102 that has received the dial information transmits a dial tone stop request (1211) to the TCW 112 via the SC 103, the LAN 104, and the PU 110 on the route 1102. The TSW 112 that has received the dial tone stop request disconnects the path 1107. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 releases the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 1103 (1212).

  Subsequently, the CC 102 transmits a voice path disconnection request (1301) to the TSW 108 via the SC 103, LAN 104, and TWSSC 107 on the route 1105, and sends a voice path disconnection request (1302) to the SC 103, LAN 104 on the route 1102. , Transmit to the TSW 112 via the PU 110.

  Further, the CC 102 transmits a voice path disconnection request (1303) to the TSW 121 via the SC 103, the LAN 104, and the PU 119 on the route 1104. Receiving each voice path disconnection request, the TSWs 108, 112, and 121 disconnect the PB signal transmission voice path 1209 of the route 1108 with the entire time switch.

  Subsequently, the CC 102 transmits a call request 1304 to the IP telephone 126 via the SC 103 and the LAN 104 on the path 1106. As a result, the bell is ringed by the IP telephone 126 (1305).

  Next, when the IP telephone 126 is off-hook (1308), a response request (1309) is transmitted from the IP telephone 126 to the CC 102 via the LAN 104 and SC 103 via the route 1106.

  Upon receiving the response request, the CC 102 transmits a voice path connection request (1310) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 1102, and sends the voice path connection request (1311) to the IP telephone on the path 1106. To 126.

  Receiving the voice path connection request, the TSW 127 connects the voice path of the route 1109 connecting the PU 110 and the IP telephone 126 (1312). As a result, a telephone call can be made between the telephone 115 and the IP telephone 126. As voice data in this call, voice data based on PCM voice data in the form of RTP packets is used between the PU 110 and the IP telephone 126 with the PU 110 as a boundary from the analog telephone. For this reason, the voice quality may be deteriorated in this call.

  On the other hand, in PB reception, voice data is exchanged between different line modules by the TSW 108 in the switch module 106, and a PB signal is transmitted by time division multiplexed PCM voice data. Compared to PCM voice data, there is no worry of erroneous dialing due to packet loss, and the PB reception function can be aggregated with a single line module, which has the advantage of improving line accommodation efficiency.

  According to this embodiment, it is possible to form a voice path connecting the caller telephone and the callee telephone with reference to the voice quality. At this time, if the telephone 115 is the caller telephone and the telephone connected to the office line 117 is the callee telephone, the voice path is exchanged in the line module 109, so that a call path for optimal voice exchange is established. The voice quality can be kept high during a call between the caller telephone and the callee telephone.

  Further, when the telephone 115 is a caller telephone and the telephone 125 is a callee telephone, a voice path is exchanged between the line modules 109 and 118 and the switch module 106 to select a call path for performing an optimum voice exchange. In addition, the voice quality can be maintained at a high quality during a call between the caller telephone and the callee telephone.

  Further, by adjusting the number of the line modules 109 and 118 in accordance with the expansion / reduction of the scale of the system, an optimal call voice exchange system can be constructed.

(Second embodiment)
In this embodiment, voice call switching systems are divided and arranged at two bases, a center base and a remote base, with an IP network in between. At this time, the main control module exists only in the center base, and the main control module performs overall control including the center base and the remote base.

  As shown in FIG. 14, in addition to the main control module 101, a LAN 104, a switch module 106, line modules 109 and 118, and IP telephones 126 and 127 are arranged at the center site. As shown in FIG. 15, an IP network 105 and a LAN 104 are arranged at the remote base, and a switch module 1501 having the same configuration as the switch module 106 is arranged. Further, a line module 1504 having the same configuration as the line module 109 and a line module 1513 having the same configuration as the line module 118 are arranged at the remote base, and IP phones 1521 and 1522 having the same configuration as the IP phones 126 and 127 are arranged. The

  At this time, the switch module 1501 includes a TSWSC 1502 and a TSW 1503. The line module 1504 includes a PU 1505, a TG 1506, a TSW 1507, an MCNT 1508, a LIN 1509, and a COT 1511. A plurality of telephones 1510 are connected to the LIN 1509, and a plurality of office lines 1512 are connected to the COT 1511. .

  The line module 1513 includes a PU 1514, a TG 1515, a TSW 1516, an MCNT 1517, a PBR 1518, and a LIN 1519, and a plurality of telephones 1520 are connected to the LIN 1519.

  Next, the operation of dial pulse outgoing / incoming calls of analog telephones between different line modules at different locations will be described according to the configuration diagrams of FIGS. 14 and 15 and the call control operation sequence of FIG.

  First, when the telephone 1510 at the remote site goes off-hook (1601), a call request (1602) is transmitted from the LIN 1509 via the path 1401 to the center site from the MCNT 1508, the PU 1505, the LAN 104, and the IP network 1505. This call request is transferred to the CC 102 via the LAN 104 and SC 104 of the center base.

  The CC 102 that has received the call request transmits a dial tone transmission request (1603) to the remote base via the SC 103, the LAN 104, and the IP network 105 on the path 1402. The dial tone transmission request is transferred to the TSW 1507 via the LAN 104 and the PU 1505 at the remote base. Receiving the dial tone transmission request, the TSW 1507 connects the path 1523. As a result, a dial tone is transmitted from the TG 1506 to the telephone set 1510 via the TSW 1507, MCNT 1508, and LIN 1509 (1604).

  Next, when the telephone 1510 at the remote site is dialed (1605), dial information (1606) is transmitted from the LIN 1509 via the route 1401 to the center site from the MCNT 1508, PU 1505, LAN 104, and IP network 1505. This dial information is transmitted to the CC 102 via the LAN 104 and SC 103 of the center base. The CC 102 that has received the dial information transmits a dial tone stop request (1607) to the remote base via the SC 103, the LAN 104, and the IP network 104 on the route 1402. The dial tone stop request is transmitted to the TSW 1507 via the LAN 104 and the PU 1505 at the remote base. The TSW 1507 that has received the dial tone stop request disconnects the path 1523. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 transmits a call request (1608) to the remote base via the SC 103, the LAN 104, and the IP network 105 on the path 1403. This call request is transmitted to the telephone set 1520 via the LAN 104, PU 1514, MCNT 1517, and LIN 1519 at the remote site. As a result, the telephone 1520 rings a bell (1609).

  Subsequently, the CC 102 transmits a ringing tone transmission request (1610) from the SC 103, the LAN 104, and the IP network 105 to the remote base on the path 1402. This ringing tone transmission request is transmitted to the TSW 1507 via the remote base LAN 104 and the PU 1505. Receiving the ringing tone transmission request, the TSW 1507 connects the path 1523. As a result, a ringing tone is sent from the TG 1506 to the telephone set 1510 via the TSW 1507, MCNT 1508, and LIN 1509 (1611).

  Next, when the telephone 1520 is off-hook (1612), a response request (1613) is transmitted from the LIN 1519 via the route 1403 to the center base from the MCNT 1517, the PU 1514, the LAN 104, and the IP network 105. This response request is transferred to the CC 102 via the LAN 104 and SC 104 at the center site. The CC 102 that has received the response request transmits a ringing tone stop request (1614) to the remote base via the SC 103, the LAN 104, and the IP network 105 on the path 1402. This ringing tone stop request is transferred to the TSW 1507 via the LAN 104 and PU 1505 at the remote base. Receiving the ringing tone stop request, the TSW 1507 disconnects the path 1523. As a result, the ringing tone that has been transmitted is stopped.

  Subsequently, the CC 102 transmits a voice path connection request (1615) to the remote base via the SC 103, the LAN 104, and the IP network 105 on the route 1405. This voice path connection request is transferred to the TSW 1503 via the LAN 104 and TWSSC 1502 at the remote base. Further, the CC 102 transmits a voice path connection request (1616) from the SC 103, the LAN 104, and the IP network 105 to the remote base on the route 1402. This voice path connection request is transferred to the TSW 1507 via the LAN 104 and PU 1505 at the remote base. Further, the CC 102 transmits a voice path connection request (1617) from the SC 103, the LAN 104, and the IP network 105 to the remote base on the route 1404. This voice path connection request is transferred to the TSW 1516 via the LAN 104 and PU 1514 at the remote base.

  The TSWs 1503, 1507, and 1516 that have received the voice path connection requests connect the voice path of the route 1524 with the entire time switch (1618). As a result, a voice call can be made between the telephone set 1510 and the telephone set 1520. The voice data used for this call is voice data exchanged in the TSW 1503 in the switch module 1501 and is time-division multiplexed PCM voice data. For this reason, the voice quality by this call is maintained at high quality.

  Further, by arranging the switch modules 106 and 1501 at the center base or the remote base, it is possible to make a call using time-division multiplexed PCM voice data even when a call is made between different line modules for each base.

  Next, the operation of dial pulse outgoing / incoming calls of analog telephones between line modules between different bases will be described according to the configuration diagrams of FIGS. 17 and 18 and the call control operation sequence of FIG.

  First, when the telephone 115 at the center base is off-hook (1902), a call request (1902) is transmitted from the LIN 114 to the CC 102 via the MCNT 113, PU 110, LAN 104, and SC 103 via the path 1701. The CC 102 that has received the call request transmits a dial tone transmission request (1903) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via a path 1702. The TSW 112 that has received the dial tone transmission request connects the path 1705. As a result, a dial tone is sent from the TG 111 to the telephone 115 via the TSW 112, MCNT 113, and LIN 114 (1904).

  Next, when the telephone 115 is dialed (1905), dial information (1906) is transmitted from the LIN 114 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 via the path 1701. The CC 102 that has received the dial information transmits a dial tone stop request (1907) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 1702. The TSW 112 that has received the dial tone stop request disconnects the path 1705. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 transmits a call request (1908) from the SC 103, the LAN 104, and the IP network 105 to the remote base on the path 1703. This call request is transferred to the telephone set 1520 via the LAN 104, PU 1514, MCNT 1517, and LIN 1519 at the remote base. As a result, the bell is ringed on the telephone 1520 at the remote site (1909).

  Next, the CC 102 transmits a ringing tone transmission request (1910) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 1702. The TSW 112 that has received the ringing tone transmission request connects the path 1705. As a result, a ringing tone is transmitted from the TG 111 to the telephone set 115 via the TSW 112, MCNT 113, and LIN 114 (1911).

  Next, when the telephone 1520 is off-hook (1912), a response request (1913) is transmitted from the LIN 1519 via the route 1703 to the center base from the MCNT 1517, PU 1514, LAN 104, and IP network 105. This response request is transferred to the CC 102 via the LAN 104 and SC 103 at the center site. The CC 102 that has received the response request transmits a ringing tone stop request (1914) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via a path 1702. The TSW 112 that has received the ringing tone stop request disconnects the path 1705. As a result, the ringing tone that has been transmitted stops.

  Subsequently, the CC 102 transmits a voice path connection request (1915) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the route 1702, and sends a voice path connection request (1916) to the SC 103, the LAN 104 via the route 1704. , And transmitted from the IP network 105 to the remote site. This voice path connection request is transferred to the TSW 1516 via the LAN 104 and PU 1514 at the remote base.

  The TSWs 112 and 1516 that have received the voice path connection request and the PUs 110 and 1514 that have received the voice path connection request respectively connect the voice paths of the path 1706 (1917). Thus, a voice call can be made between the telephone 115 and the telephone 1520.

  The voice data used for this voice call is PCM voice data converted into RTP packets from the analog telephone to the PU 110 and PU 1514. For this reason, the voice quality in this voice call may deteriorate. However, a call between line modules at different bases is a call made via the switch modules 106 and 1501, and cannot be performed using PCM voice data that is time-division multiplexed, but can be performed using PCM voice data that is RTP packetized. Become.

  Next, the operation at the time of making a local call by PB dial from an analog telephone between different line modules at different bases will be described according to the configuration diagram of FIG. 20 and FIG. 21 and the call control operation sequence of FIG. 22 and FIG. To do.

  First, when the telephone 115 at the center site is off-hook (2201), a call request (2202) is transmitted from the LIN 114 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 on the route 2001. The CC 102 that has received the call request captures the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 2003 (2203).

  Subsequently, the CC 102 transmits a push button signal voice path connection request (2204) to the TSW 108 via the SC 103, the LAN 104, and the TWSSC 107 on the route 2005 on the condition that the PBR 123 is captured. The push button signal voice path connection request (2205) is transmitted to the TSW 121 via the SC 103, the LAN 104, and the PU 119. Further, the push button signal voice path connection request (2206) is sent to the SC 103, the LAN 104, and the PU 110 via the path 2002. To TSW 112 via

  The TSWs 108, 112, and 212 that have received each push button signal voice path connection request connect the PB signal transmission voice path of the path 2008 with the entire time switch (2211). This makes it possible to send a PB signal from the telephone 115 to the PBR 123.

  Next, the CC 102 transmits a PB reception request (2207) to the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 2003. Subsequently, the CC 102 transmits a dial tone transmission request (2208) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the route 2002. The TSW 112 that has received the dial tone transmission request connects the path 2007. As a result, a dial tone is transmitted from the TG 111 to the telephone 115 via the TSW 112, MCNT 113, and LIN 114 (2209).

  Next, when the telephone 115 is PB dialed (2210), a PB signal is transmitted from the telephone 115 as PCM voice data time-division multiplexed to the PBR 123 via a path 2008 (2211). The PBR 123 that has received the PB signal converts the received PB signal into dial information, and transmits the converted dial information to the CC 102 via the MCNT 122, PU 119, LAN 104, and SC 103 on the route 2003.

  The CC 102 that has received the dial information transmits a dial tone stop request (2213) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the route 2002. The TSW 112 that has received the dial tone stop request disconnects the path 2007. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 releases the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 112 on the path 2003 (2214).

  Subsequently, the CC 102 transmits a voice path disconnection request (2215) to the TSW 108 via the SC 103, LAN 104, and TWSSC 107 on the route 2005, and sends a voice path disconnection request (2216) to the SC 103, LAN 104 on the route 2004. The voice path disconnection request (2217) is transmitted to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via the route 2002. Receiving each voice path disconnection request, the TSWs 108, 121, and 112 disconnect the connection (2211) of the PB signal transmission voice path of the path 2008.

  Subsequently, the CC 102 transmits a voice path connection request (2301) from the SC 103, the LAN 104, and the IP network 105 to the remote base on the path 2009. This voice path connection request is transferred to the TSW 1507 via the LAN 104 and the PU 1505 at the remote base.

  Further, the CC 102 transmits a voice path connection request (2302) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the route 2002. The TSWs 112 and 1507 that have received the voice path connection request and the PUs 110 and 1505 that have received the voice path connection request connect the voice path of the path 2010 (2303).

  Next, the CC 102 transmits a call request (2304) to the COT 15111 via the SC 103, the LAN 104, the PU 1505, and the MCNT 1508 on the path 2006. The COT 1511 that has received the call request captures the office line 1512 (2305). When the office line 1512 is captured, an audio path is connected between the telephone set 115 and the office line 1512 (2306). As a result, a voice call can be made between the telephone set 115 and the office line 1512.

  The voice data used for this voice call is PCM voice data RTP-packeted from the analog telephone to the PU 110 and from the office line 1512 to the PU 1505. For this reason, the voice quality in this call may deteriorate.

  In this connection, it is possible to capture a station line existing at another base via the IP network 105, so that the line cost can be reduced and the merit of the IP exchange terminal can be utilized.

  Also, for PB dialing, since the PB receiving function in the same base as the transmitting telephone is used, it is voice data used for voice exchange of the TSW 108 in the switch module 106 and is time-division multiplexed PCM voice data Since the PB signal is sent by, there is no fear of erroneous dialing due to packet loss compared to PCM voice data converted into RTP packets.

  According to this embodiment, it is possible to form a voice path connecting the caller telephone and the callee telephone with reference to the voice quality. At this time, when the telephone 1510 is a caller telephone and the telephone 1520 is a callee telephone, a voice path is exchanged between the line modules 1504 and 1513 and the switch module 1501 to select a call path for optimal voice exchange. The voice quality can be maintained at a high quality during a call between the caller telephone and the callee telephone.

  Also, by adjusting the number of line modules 109, 118, 1504, and 1513 according to the expansion / reduction of the scale of the system, it is optimal even when voice call switching systems are distributed and arranged at the center base and the remote base. It is possible to construct a simple call voice exchange system.

(Third embodiment)
24 and 25 are configuration diagrams in which the voice communication system in the third embodiment is duplicated. As shown in FIGS. 24 and 25, the call voice exchange system includes a main control module 101, a LAN 104, an IP network 105, a switch module 106, a # 1 line module 109, and a # 2 line module 118. , And a plurality of IP telephones 126, 127 constituting the IP terminal. The main control module 101, the switch module 106, the line modules 109 and 118, the IP network 105, and the IP telephones 126 and 127 are connected to the LAN 104, respectively.

  The switch module 106 is composed of the 0 system TSWSC 107 and TSW 108, the 1 system TSWSC 2401 and TSW 2402, and the 1 system TSWSC 2401 and TSW 2402 have the same functions as the 0 system TSWSC 107 and TSW 108, and the system is between the TSWSC 107 and TWSSC 2401. Interlaced and copy audio path data. Here, the voice path data is transmission path (channel) connection information for voice exchange of PCM voice data. The TSWSC 107 and the TSWSC 2401 convert the packetized call control information on the LAN 104 and the copied voice path data into signals that can be transmitted and received by the TSW 108 and the TSW 2402. The TSW 108 and the TSW 2402 are connected to the line module 109 and the line module 118, and perform voice exchange of time-division multiplexed PCM voice data based on signals from the TSWSC 107 and the TSWSC 2401.

  The line module 109 is composed of the 0 system PU 110, TG 111, TSW 112, MCNT 113, 1 system PU 2403, TG 2404, TSW 2405, MCNT 2406, LIN 114, and COT 116, and the 1 system PU 2403, TG 2404, TSW 2405, and MCNT 2406 are composed of the 0 system PU 110. TG111, TSW112, and MCNT113 have the same functions, and are interlaced between PU110 and PU2403 to copy voice path data. The PU 110 and PU 2403 convert the packetized call control information and PCM voice data on the LAN 104 into signals that can be transmitted / received in the line module 109, and the copied voice path data is converted into signals that can be transmitted / received by the TSW 122 and TSW 2405. Convert.

  The TSW 112 is connected to the TG 111 and MCNT 113 and the TSW 108 and TSW 2402 in the switch module 106, and performs voice exchange of time-division multiplexed PCM voice data.

  The TSW 2405 is connected to the TG 2404 and MCNT 2406 and the TSW 108 and TSW 2402 in the switch module 106, and performs voice exchange of time-division multiplexed PCM voice data.

  MCNT 113 and MCNT 2406 are connected to LIN 114 and COT 116, respectively, and exchange call control information or time-division multiplexed PCM voice data.

  The line module 118 has a PBR 123 disposed in place of the COT 116, and the other configuration is the same as that of the line module 109.

  FIG. 26 shows a configuration diagram for explaining switching of audio data transmission paths when duplexing. The voice data transmission path in the call voice exchange system is constituted by a line interface such as the switch module 106, the line modules 109 and 118, the LIN 114 and the COT 116, and forms a voice path connecting the caller telephone and the callee telephone. Transmission of time-division multiplexed PCM voice data is performed by TSWs 112, 108, 121, 2405, 2402, and 2504, and PCM voice data that has been RTP packetized is routed through the LAN 104 via PUs 110, 119, 2403, and 2502. Is transmitted.

  The line interface 109 includes a line interface 2601 connected to the LIN 114 and the COT 116, and the line interface 2601 includes a selector 2602. The selector 2602 is connected to the 0-system TSW 112 via the path 2631 and is connected to the 1-system TSW 2405 via the path 2632. The line interface 118 includes a line interface 2605 connected to the LIN 124 and the PBR 123, and the line interface 2605 includes a selector 2606. The selector 2606 is connected to the 0-system TSW 121 via the path 2641 and is connected to the 1-system TSW 2504 via the path 2642.

  The 0-system TSW 112 is connected to the selector 2603. The selector 2603 is connected to the selector 2609 in the switch module 106 via a path 2633 and is connected to the selector 2611 in the switch module 106 via a path 2634. The 1-system TSW 2405 is connected to the selector 2604. The selector 2604 is connected to the selector 2609 in the switch module 106 via a path 2635 and is connected to the selector 2611 in the switch module 106 via a path 2636. The selector 2609 is connected to the 0-system TSW 108, and the selector 2611 is connected to the 1-system TSW 2402.

  The 0-system TSW 121 is connected to the selector 2607. The selector 2607 is connected to the selector 2610 in the switch module 106 via a path 2637 and is connected to the selector 2612 in the switch module 106 via a path 2639. The 1-system TSW 2504 is connected to the selector 2608. The selector 2608 is connected to the selector 2610 in the switch module 106 via a path 2638 and is connected to the selector 2612 in the switch module 106 via a path 2640. The selector 2610 is connected to the 0-system TSW 108, and the selector 2612 is connected to the 1-system TSW 2402.

  Paths 2631 to 2642 are transmission paths for time-division multiplexed PCM audio data, and these paths are switched by selectors 2602, 2603, 2604, 2607 to 2612. The selector 2602 switches the paths 2631 and 2632 based on information (notification) from the TSWs 112 and 2405. At this time, the 0-system TSW 112 uses information 2651 for selecting the path 2631 to the selector 2602 when the paths 2631, 2633, and 2636 are used as the path of the active system (hereinafter sometimes referred to as ACT). And outputs information 2651 for selecting the paths 2633 and 2635 to the selectors 2609 and 2611. The 1-system TSW 2405 uses information 2651 for selecting the path 2632 to the selector 2602 when the paths 2632, 2634, and 2635 are used as a standby system or standby system (hereinafter, referred to as SBY) path. And outputs information 2651 for selecting the paths 2633 and 2635 to the selectors 2609 and 2611.

  The selector 2606 switches the paths 2641 and 2642 based on information (notification) from the TSWs 121 and 2504. At this time, when using the paths 2641, 2637, and 2640 as the ACT, the 0-system TSW 121 outputs information 2653 for selecting the path 2641 to the selector 2606, and sets the paths 2637 and 2640 to the selectors 2610 and 2612. Information 2653 for selection is output. When using the paths 2642, 2638, and 2639 as SBY, the 1-system TSW 2504 outputs information 2653 for selecting the path 2642 to the selector 2606, and selects the paths 2638 and 2639 to the selectors 2610 and 2612. Information 2653 is output.

  The selectors 2603, 2604, 2607, and 2608 switch the paths 2633 to 2640 based on information (notification) from the TSW 108 and 2402 of the switch module 106. At this time, when the routes 2633 and 2636 or the routes 2637 and 2640 are used as the ACT, the 0-system TSW 108 outputs information 2652 for selecting the routes 2633 and 2636 to the selectors 2603 and 2604, and the selectors 2607 and 2608. In addition, information 2652 for selecting the paths 2637 and 2640 is output. When using the routes 2634 and 2635 or the routes 2638 and 2639 as the SBY, the 1-system TSW 2402 outputs information 2652 for selecting the routes 2634 and 2635 to the selectors 2603 and 2604, and outputs the information to the selectors 2607 and 2608. Information 2652 for selecting 2638 and 2639 is output.

  The 0-system PU 110 in the line module 109 is connected to the TSW 112 and is also connected to the LAN 104 via the RTP packet filter 2621 to convert between time-division multiplexed PCM voice data and RTP packetized PCM voice data. . The 1-system PU 2403 is connected to the TSW 2405 and connected to the LAN 104 via the RTP packet filter 2622, and performs conversion between time-division multiplexed PCM voice data and RTP packetized PCM voice data. The 0-system PU 119 in the line module 118 is connected to the TSW 121 and connected to the LAN 104 via the RTP packet filter 2623, and performs conversion between time-division multiplexed PCM voice data and RTP packetized PCM voice data. . The 1-system PU 2502 is connected to the TSW 2004 and is also connected to the LAN 104 via the RTP packet filter 2624, and performs conversion between time-division multiplexed PCM audio data and RTP packetized PCM audio data.

  Here, the RTP packet filters 2621 to 2624 function as a filter that blocks transmission of RTP packets when on and passes packets such as call control information, and passes packets such as RTP packets and call control information when off. . For example, when the 0-system PU 110 is used as an ACT, the RTP packet filter 2621 is turned off and allows RTP packets and packets such as call control information to pass through. In this case, audio data can be transmitted between the LAN 104 and the TSW 112. On the other hand, when the 0-system PU 110 is used as SBY, the RTP packet filter 2628 is turned on to block transmission of the RTP packet and pass a packet such as call control information. In this case, transmission of audio data between the LAN 104 and the TSW 112 becomes impossible.

  In this way, the 0-system TSW 112, 121, 108, or the 1-system TSW 2405, 2502, 2402 notifies the selectors 2602 to 2604 and 2606 to 2612 of ACT or SBY information, so that the switch module 106 and the line module 109 118, the audio data can always be transmitted using the ACT audio data transmission path (the audio data transmission path including the path selected as ACT) even if the paths 2631 to 2642 are switched. it can.

  FIG. 27 shows a sequence for explaining switching of IP addresses when duplexing. Three PUs 110 and 2403 in the line module 109 are registered with a 0 system IP address, a 1 system IP address, and an ACT IP address. For example, when the power is turned ON (2701), the 0-system PU 110 rises with the 0-system IP address (2702), and the 1-system PU 2403 rises with the 1-system IP address (2703). When the 0-system PU 110 performs 0-system ACT notification (2705) to the 1-system PU 2403 and changes the IP address to the ACT IP address (2704), the 0-system PU 110 becomes the ACT (2706) as the active system. The 1-system PU 2403 becomes SBY (2707) as the standby system. When the 1-system PU 2403 receives the system switching request 2708 from the CC-SC 101, the 1-system PU 2403 issues a restart request 2709 to the 0-system PU 110, changes the IP address to the IP address for ACT (2711), and ACT (2713). On the other hand, the 0-system PU 110 that has received the switching request 2708 restarts (2710), rises with the 0-system IP address (2712), and receives the 1-system ACT notification 2714 from the 1-system PU 2403, the SBY (2715) It becomes.

  In this way, when switching between ACT and SBY, by switching the IP address for ACT between the PU 110 and the PU 2403, the call can be continued even for RTP packets that specify the destination by the IP address. it can.

  Next, the outgoing / incoming call operation and the system switching operation during a call in this embodiment will be described with reference to the block diagram of FIG. 28 and the call control operation sequence of FIGS.

  Here, in the line module 109, the 0 system PU 110, TG 111, TSW 112, and MCNT 113 are ACT, and the 1 system PU 2403, TG 2404, TSW 2405, and MCNT 2406 are SBY. In the switch module 106, the 0-system TWSSC 107 and TSW 108 are ACT, and the 1-system TWSSC 2401 and TSW 2402 are SBY.

  First, when the telephone 115 connected to the line module 109 is off-hooked (2901) and an off-hook signal is output from the telephone 115, a call request (2902) is sent from the LIN 114 via the path 2801 to the MCNT 113, PU 110, LAN 104, SC 103. Via CC102.

  The CC 102 that has received the call request (2902) transmits a dial tone transmission request (2903) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 2802. Upon receiving the dial tone transmission request (2903), the TSW 112 connects the path 2804. As a result, a dial tone is sent from the TG 111 to the telephone 115 via the TSW 112, MCNT 113, and LIN 114 (2904).

  Next, when a dial (2908) originated from the telephone line is generated from the telephone 115, dial information (2909) is sent from the LIN 114 to the CC 102 via the MCNT 113, PU 110, LAN 104, and SC 103 via the path 2801.

  The CC 102 that has received the dial information (2909) transmits a dial tone stop request (2910) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via the path 2802. Upon receiving the dial tone stop request (2910), the TSW 112 disconnects the path 2804. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 transmits a voice path connection request (2913) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the route 2802. Receiving the voice path connection request (2913), the TSW 112 connects the voice path constituted by the path 2805 between the LIN 114, the MCNT 113, the TSW 112, the MCNT 113, and the COT 116 (2914). In addition, the PU 110 performs path data copy (path data including information such as a path configuring the voice data transmission path) to the PU 2403 through the path 2806 (2915), and the PU 2403 passes the path (voice path) through the path 2807. A connection request (2916) is transmitted to the TSW 2405. As a result, a voice path (backup voice path) configured by the route 2809 between the LIN 114, the MCNT 2406, the TSW 2405, the MCNT 2406, and the COT 116 is formed (2917). Here, since the LIN 114 and the COT 116 select the ACT TSW 112 by the selector 2602 to form a path, the voice path to the telephone set 115 and the office line 117 is used by the path 2805 that forms the active voice path. Is done.

  Next, the CC 102 sends a call request (3001) to the COT 116 via the SC 103, the LAN 104, the PU 110, and the MCNT 113 on the path 2803. The COT 116 that has received the call request (3001) captures the office line 117 (3002). As a result, the voice path (working voice path) of the route 2805 connecting the telephone set 115 and the office line 117 is connected (3003). That is, an active voice path is formed as a voice path connecting the call source and the call destination, and a voice call can be made between the telephone set 115 and the office line 117.

  Here, for example, it is assumed that the PU 110 has failed (3005), and there is no response to the life check (3004) transmitted from the CC 102 to the PU 103 via the LAN 104 on the path 2810. Then, the CC 102 determines that the 0-system PU 110 has failed, and transmits a system switching request (3006) to the 1-system PU 2403 through the path 2811. Upon receiving the system switching request (3006), the PU 2403 performs switching from SBY to ACT (3007), and notifies the LIN 114 and the COT 116 of information (3008) that the 1-system TSW 2405 has become ACT on the path 2809. The LIN 114 and the COT 116 that have received the 1-system ACT information (3008) switch the selector 2602. As a result, a voice path (standby voice path) of the route 2809 connecting the telephone set 115 and the office line 117 is connected (3009). That is, as a voice path connecting the call source and the call destination, a backup voice path is formed instead of the active voice path, and the voice call can be continued between the telephone set 115 and the office line 117. .

  This voice call uses TSW 112 and 2405 to transmit time-division multiplexed PCM voice data. Since the line module is duplicated and the voice path data in ACT is copied to SBY and the voice path is formed, even if a failure occurs in ACT, switching from ACT to SBY is performed, and time division Transmission of multiplexed PCM audio data can be continued. That is, even if a failure occurs, the voice quality can be prevented from being deteriorated and the voice quality can be maintained in an optimum state.

  Next, FIG. 31 and FIG. 32 show the operation of outgoing / incoming calls when talking to an IP phone by PB dial from an analog telephone between different line modules in the same base and the system switching operation during a call. The operation will be described in accordance with FIG. And the call control operation sequence shown in FIGS.

  Here, in the line module 109, the 0 system PU 110, TG 111, TSW 112, and MCNT 113 are ACT, and the 1 system PU 2403, TG 2404, TSW 2405, and MCNT 2406 are SBY. In the line module 118, the 0 system PU 119, TG 120, TSW 121, and MCNT 122 are ACT, and the 1 system PU 2502, TG 2503, TSW 2504, and MCNT 2505 are SBY. In the switch module 106, the 0-system TWSSC 107 and TSW 108 are ACT, and the 1-system TWSSC 2401 and TSW 2402 are SBY.

  First, when the telephone 115 is off-hook (3301), a call request (3302) is transmitted from the LIN 114 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 via the path 3104. The CC 102 that has received the call request captures the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 3107 (3303).

  Subsequently, the CC 102 transmits a push button signal voice path connection request (3304) to the TSW 108 via the SC 103, the LAN 104, and the TWSSC 107 on the route 3101 on the condition that the PBR 123 is captured. The push button signal voice path connection request (3305) is transmitted to the TSW 112 via the SC 103, the LAN 104, and the PU 110. Further, the CC 102 transmits a push button signal voice path connection request (3306) to the TSW 121 via the SC 103, the LAN 104, and the PU 119 on the path 3106.

  The TSWs 108, 112, and 121 that have received each push button signal voice path connection request connect the PB signal transmission voice path of the path 3109 with the entire time switch (3311). As a result, the PB signal can be transmitted from the telephone 115 to the PBR 123.

  Next, the CC 102 sends a PB reception request (3307) to the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 3107.

  Subsequently, the CC 102 transmits a dial tone transmission request (3308) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 3103. The TSW 112 that has received the dial tone transmission request connects the path 3110. As a result, a dial tone is sent from the TG 111 to the telephone 115 via the TSW 112, MCNT 113, and LIN 114 (3309).

  Next, when a PB dial (3310) is performed by the telephone set 115, a PB signal based on PCM voice data time-division multiplexed to the PBR 123 is transmitted from the telephone set 115 to the PBR 123 via the path 3109 (3311). The PBR 123 that has received the PB signal converts the received PB signal into dial information, and transmits the converted dial information to the CC 102 via the MCNT 122, PU 119, LAN 104, and SC 103 via the path 3107.

  The CC 102 having received the dial information transmits a dial tone stop request (3313) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 3103. The TSW 112 that has received the dial tone stop request disconnects the path 3110. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 releases the PBR 123 via the SC 103, the LAN 104, the PU 119, and the MCNT 122 on the path 3107 (3314).

  Subsequently, the CC 102 transmits a voice path disconnection request (3315) to the TSW 108 via the SC 103, the LAN 104, and the TSWSC 107 on the path 3101, and sends a voice path disconnection request (3316) to the SC 103, the LAN 104 via the path 3103. , Transmit to the TSW 112 via the PU 110. Further, the CC 102 transmits a voice path disconnection request (3317) to the TSW 121 via the SC 103, the LAN 104, and the PU 119 on the route 3106. Receiving each voice path disconnection request, the TSWs 108, 112, and 121 disconnect the PB signal transmission voice path of the path 3109 with the entire time switch.

  Subsequently, the CC 102 transmits a call request 3401 to the IP telephone 126 via the SC 103 and the LAN 104 on the path 3108, and rings the bell of the IP telephone 126 (3402). Further, the CC 102 transmits a ringing tone transmission request 3403 to the TSW 112 via the SC 103, the LAN 104, and the PU 110 via the path 3103. The TSW 112 that has received the ringing tone transmission request 3403 connects the path 3110. As a result, a ringing tone is transmitted from the TG 111 to the telephone 115 via the TSW 112, MCNT 113, and LIN 114 (3404).

  Next, when the IP telephone 126 is off-hook (3108), a response request (3405) is transmitted from the IP telephone 126 to the CC 102 via the LAN 104 and SC 103 via the path 3108.

  The CC 102 having received the response request transmits a voice path connection request (3405) on the path 3103 to the TSW 112 via the SC 103, the LAN 104, and the PU 110, and sends a voice path connection request (3407) on the path 3108 to the IP telephone. To 126.

  Receiving the voice path connection request, the TSW 112 connects the voice path (active voice path) of the path 3111 connecting the PU 110 and the IP telephone 126 (3408). As a result, a telephone call can be made between the telephone 115 and the IP telephone 126. Also, the PU 110 performs path data copy (3409) to the PU 2403 via the path 3112, and the PU 2403 transmits a path connection request (3410) to the TSW 2405 via the path 3113. As a result, a voice path (backup voice path) configured by the path 3114 between the LIN 114, the MCNT 2406, the TSW 2405, and the PU 2403 is formed (3411). Here, in the LIN 114, the TSW 112 of the ACT is selected by the selector 2602 and a path is formed. In the PU 2403, the RTP packet is blocked by the RTP packet filter 2622. Therefore, the voice path to the telephone 115 and the IP telephone 126 is Path 3111 is used.

  Next, for example, it is assumed that the PU 110 fails (3502), and there is no response to the life check (3501) transmitted from the CC 102 to the PU 110 via the LAN 103 on the path 3102. Then, the CC 102 determines that the 0-system PU 110 has failed, and transmits a system switching request (3503) to the 1-system PU 2403 through the path 3105. Upon receiving the system switching request (3503), the PU 2403 switches from SBY to ACT (3504), and notifies the LIN 114 of information (3505) indicating that the 1-system TSW 2405 has become ACT on the path 3114. The LIN 114 that has received the 1-system ACT information (3114) switches the selector 2602. The PU 2403 transmits a restart request 3506 to the PU 110 via the path 3110 to restart the PU 110, TG 111, TSW 112, and MCNT 113 (3507). Subsequently, the PU 2403 switches from the 1-system IP address to the ACT IP address (3508) and turns off the operation of the RTP packet filter 2622, thereby connecting the path 3115 between the telephone 115 and the IP telephone 126. Are connected (3510). That is, a voice connection path connecting the caller and the callee is formed, and the voice call can be continued between the telephone 115 and the IP telephone 126.

  In this voice call, PCM voice data converted into RTP packets is transmitted between the PU 110 and the IP telephone 126 with the PU 110 as a boundary from the analog telephone. The line module is duplicated, and the voice path data in ACT is copied from ACT to SBY to form a voice connection path. Therefore, even if a failure occurs in ACT, switching from ACT to SBY is performed. The transmission of voice data can be continued. However, when switching from SBY to ACT, in order to continue transmission of RTP packetized PCM voice data, after switching the IP address, a voice connection path connecting the caller and the callee is formed. Therefore, RTP packets are not transmitted at regular intervals, and voice quality deteriorates.

  Next, the operations of dial pulse outgoing / incoming calls of analog telephones between different line modules in the same base and the system switching operation during a call are shown in the configuration diagrams of FIGS. 36 and 37 and the call control of FIGS. 38 and 39. A description will be given according to the operation sequence.

  Here, in the line module 109, the 0 system PU 110, TG 111, TSW 112, and MCNT 113 are ACT, and the 1 system PU 2403, TG 2404, TSW 2405, and MCNT 2406 are SBY. In the line module 118, the 0 system PU 119, TG 120, TSW 121, and MCNT 122 are ACT, and the 1 system PU 2502, TG 2503, TSW 2504, and MCNT 2505 are SBY. In the switch module 106, the 0-system TWSSC 107 and TSW 108 are ACT, and the 1-system TWSSC 2401 and TSW 2402 are SBY.

  First, when the telephone 115 is off-hook (3801), a call request (3802) is transmitted from the LIN 115 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 via the path 3605. The CC 102 that has received the call request (3802) transmits a dial tone transmission request (3803) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on a path 3604. Upon receiving the dial tone transmission request (3803), the TSW 112 connects the path 3514. As a result, a dial tone is transmitted from the TG 111 to the telephone set 115 via the TSW 112, MCNT 113, and LIN 114 (3804).

  Next, when dialing (3805) is performed by the telephone set 115, dial information (3806) is transmitted from the LIN 114 to the CC 102 via the MCNT 113, the PU 110, the LAN 104, and the SC 103 via the path 3605.

  The CC 102 having received the dial information (3806) transmits a dial tone stop request (3807) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 3604. Upon receiving the dial tone stop request (3807), the TSW 112 disconnects the path 3614. As a result, the transmitted tone is stopped.

  Subsequently, the CC 102 transmits a call request (3808) to the telephone set 125 via the SC 103, the LAN 104, the PU 119, the MCNT 122, and the LIN 124 on the path 3607. As a result, the bell is ringed by the telephone 125 (3809).

  Subsequently, the CC 100 transmits a ringing tone transmission request (3810) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on the path 3604. Receiving the ringing tone transmission request (3810), the TSW 112 connects the path 3614. As a result, a ringing tone is transmitted from the TG 111 to the telephone set 115 via the TSW 112, MCNT 113, and LIN 114 (3811).

  Next, when the telephone 125 is off-hook (3812), a response request (3813) is transmitted from the LIN 124 to the CC 102 via the MCNT 122, the PU 119, the LAN 104, and the SC 103 via the path 3607.

  The CC 102 that has received the response request (3813) transmits a ringing tone stop request (3814) to the TSW 112 via the SC 103, the LAN 104, and the PU 110 on a path 3604. The TSW 112 that has received the ringing tone stop request (3814) disconnects the path 3614. As a result, the ringing tone that has been transmitted is stopped.

  Subsequently, the CC 102 transmits a voice path connection request (3815) to the TSW 108 via the SC 103, the LAN 104, and the TSWSC 107 on the route 3601, and sends a voice path connection request (3818) to the SC 103, the LAN 104 on the route 3604. The voice path connection request (3819) is transmitted to the TSW 121 via the SC 103, the LAN 104, and the PU 119 on the route 3606. Receiving each voice path connection request, the TSWs 108, 112, and 121 connect the voice path (active voice path) of the path 3612 with the entire time switch (3901). As a result, a voice call can be made between the telephone 115 and the telephone 125.

  On the other hand, the 0-system TSWSC 107 that has received the voice path connection request (3815) transmits the voice path data copy (3816) to the 1-system TSWSC 2401 through the path 3608, and the TWSSC 2401 that has received the voice path data copy (3816) In 3609, a path connection request (3609) is transmitted to the TSW 2402. As a result, the 1-system TSW 2402 forms a voice path (path 3613) similar to that of the 0-system TSW 108 as a backup-system voice path. However, the selector 2603 in the line module causes the telephone 115 to be connected between the telephone 115 and the telephone 125. In the voice call, the route 3612 of the 0 system TSW 108 is used.

  The 0-system PU 110 that has received the voice path connection request (3818) transmits the voice path data copy (3902) to the 1-system PU 2403 via the path 3610, and the PU 2403 that has received the voice path data copy (3902) In 3611, a path connection request (3903) is transmitted to the TSW 2405. As a result, an audio path (route 3615) similar to that of the 0-system TSW 112 is formed in the 1-system TSW 2405 as a backup-system audio path. However, the selector 2609 in the switch module is used to connect the telephone 115 to the telephone 125. In the voice call, the route 3612 of the 0-system TSW 112 is used as the active voice path.

  Further, the 0-system PU 119 that has received the voice path connection request (3819) transmits the voice path data copy (3904) to the 1-system PU 2502 via the path 3701, and the PU 2502 that has received the voice path data copy (3904) receives the path In 3702, a path connection request (3905) is transmitted to the TSW 2504. As a result, the 1-system TSW 2504 forms a voice path (path 3616) similar to that of the 0-system TSW 121 as a backup-system audio path. However, the selector 2610 in the switch module causes the telephone system 115 to communicate with the telephone system 125. In the voice call, the route 3612 of the 0-system TSW 121 is used as the active-system voice path.

  Here, for example, it is assumed that the TSWSC 107 fails (3908) and there is no response to the life check (3907) transmitted from the CC 102 to the SCWS and the LAN 104 via the path 3602 to the TSWSC 107. Then, the CC 102 determines that the 0-system TSWSC 107 has failed, and transmits a system switching request (3909) to the 1-system TSWSC 2401 through the path 3603. Upon receiving the system switching request (3909), the TSWSC 2401 performs switching (3910) from SBY to ACT, and notifies the TSW 112 and the TSW 121 of information (3911) that the TSW 2402 of the first system becomes ACT on the path 3613. The TSW 112 and TSW 121 that have received the 1-system ACT information (3911) switch the selectors 2603 and 2607 to connect the voice path of the path 3613 (standby voice path) connecting the telephone set 115 and the telephone set 125 (3912). . That is, the voice path connecting the caller and the callee is switched from the active voice path to the standby voice path, and the voice call can be continued between the telephone set 115 and the telephone set 125.

  In this voice call, transmission of time-division multiplexed PCM voice data is performed using TSW 108, 2402, 112, and 121. Since the switch module is duplicated, the voice path data in ACT is copied to SBY and the voice path is formed, so even if a failure occurs in ACT, switching to SBY is performed and time division multiplexed Transmission of PCM audio data can be continued. That is, even if a failure occurs, the voice quality can be prevented from being deteriorated and the voice quality can be maintained in an optimum state.

  When the CC 102 determines that the 0-system line module is out of order, the CC 102 selects the paths 3615 and 3616 that form the backup voice path instead of the path 3612 that forms the active voice path. Can be output to the PUs 110 and 2304 and the PUs 119 and 2502.

  According to the present embodiment, even if a line module or a switch module belonging to ACT fails, by switching the system from ACT to SBY, the caller phone and the callee phone based on the voice quality It is possible to continue to form a voice path connecting the two.

  At this time, when the telephone 115 is the caller telephone and the telephone connected to the office line 117 is the callee telephone, the voice path data in the TSW 112 in the line module 109 is copied to the TSW 2405 when the voice path is formed. By forming a spare call path, it is possible to switch the system in the event of a failure and maintain a call path for optimal voice exchange.

  Also, when the telephone 115 is the caller telephone and the telephone 125 is the callee telephone, the voice path data (connection information of the active voice path) is copied in each of the line modules 109 and 118 and the switch module 106. By forming a spare call path, it is possible to switch the system in the event of a failure and maintain a call path for optimal voice exchange.

  The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. For example, the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Further, each of the above-described configurations, functions, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function is stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), an IC (Integrated Circuit) card, an SD (Secure Digital) memory card, a DVD ( Digital Versatile Disc) can be recorded and placed.

  101 Main control module, 102 CC, 103 SC, 104 LAN, 106 Switch module, 107 TSWSC, 108 TSW, 109 Line module, 110 PU, 111 TG, 112 TSW, 113 MCNT, 114 LIN, 116 COT, 115 Telephone, 117 Office line, 118 line module, 119 PU, 120 TG, 121 TSW, 122 MCNT, 123 PBR, 124 LIN, 126, 127 IP telephone.

Claims (15)

Connected to the IP telephone network through a voice data transmission path for transmitting packetized voice data, and connected to at least a plurality of telephones or a plurality of office lines connected to a public switched telephone network. A plurality of line modules that convert the voice data into time-division voice data;
A switch module connected to each of the voice data transmission path and each line module, for performing voice exchange between specified line modules among the plurality of line modules;
A module connected to the voice data transmission path, wherein the type and location of each telephone is associated with a call request from each telephone, and the telephone number of each telephone is Mainly managing each line module and the switch module as at least a management target based on management information including number information associated with the dial information and call control information for controlling each telephone. A control module;
The main control module is
When a call request is received from the telephone, the type and location of a caller telephone serving as a caller is specified based on the received call request and the telephone information, and the specified call is determined based on the call control information. When call control is performed on the original telephone and dial information is received from the caller telephone, a call destination telephone that is a call destination of the caller telephone is identified based on the received dial information and the number information, Based on the management information related to the specified caller telephone and the callee telephone among the management information, specify the issue destination of the voice connection path connection request, and output the voice connection path connection request to the specified issue destination,
The issuance destination that has received the voice connection path connection request forms at least a part of a voice path that connects the caller telephone and the callee telephone based on the received voice connection path connection request. Call voice exchange system. The call voice exchange system according to claim 1,
The main control module is
The issuance destination of the voice connection path connection request is a line module connected to the caller telephone, and is a line module connected to the callee telephone, and the line modules are the same line module. When it is determined that the voice connection path connection request is output to the same line module,
The same line module forms a voice path connecting the call source telephone and the call destination telephone in the line module based on the received voice connection path connection request. . The call voice exchange system according to claim 1,
The main control module is
The voice connection path connection request is issued to the line module connected to the caller telephone, the line module different from the line module and connected to the callee telephone, and the switch module. The line connection connected to the caller telephone, the line module connected to the callee telephone, and the switch module to output the voice connection path connection request,
The line module connected to the caller telephone forms a voice path that connects the caller telephone and the switch module based on the voice connection path connection request received from the main control module,
The line module connected to the destination telephone forms a voice path connecting the destination telephone and the switch module based on the voice connection path connection request received from the main control module,
The switch module transfers voice data from the line module connected to the caller telephone to the line module connected to the callee telephone based on the voice connection path connection request received from the main control module. The voice exchange system for calls is characterized by forming a voice path. The call voice exchange system according to claim 1,
The main control module is
The voice connection path connection request issuance destination is a line module connected to the caller telephone and a management target connected to the voice data transmission path, and is an IP telephone connected to the IP network. If determined, output the voice connection path connection request to the line module connected to the caller telephone and the IP telephone connected to the voice data transmission path,
The line module connected to the caller telephone forms a voice path connecting the caller telephone and the voice data transmission path based on the voice connection path connection request received from the main control module,
The IP telephone system forms a voice path between the voice data transmission path and the own IP telephone based on a voice connection path connection request received from the main control module. The call voice exchange system according to claim 1,
A plurality of remote line modules having the same function as each of the line modules existing in the center base, located in a remote base away from the center base where the main control module exists;
A module connected to the voice data transmission path and connected to each of the remote line modules and disposed at the remote base, wherein a specified remote line module among the plurality of remote line modules is connected. A remote switch module for selecting a call path to be connected,
The main control module is
Managing each remote line module and the remote switch module as the management target;
The voice connection path connection request is issued to a remote line module existing at the remote base, and the remote line module connected to the caller telephone is different from the remote line module. A remote line module connected to the caller telephone, and a remote line module connected to the caller telephone, if connected to the caller telephone Outputting the voice connection path connection request to the remote line module and the remote switch module,
The remote line module connected to the caller telephone forms a voice path connecting the caller telephone and the remote switch module based on the voice connection path connection request received from the main control module,
The remote line module connected to the call destination telephone forms a voice path connecting the call destination telephone and the remote switch module based on the voice connection path connection request received from the main control module,
The remote switch module uses the voice connection path connection request received from the main control module to connect the voice data from the remote line module connected to the caller telephone to the remote telephone connected to the callee telephone. A call voice exchange system characterized by forming a voice path for transfer to a line module. The call voice exchange system according to claim 1,
A plurality of remote line modules having the same function as each of the line modules existing in the center base, located at a remote base away from the center base where the main control module exists;
The main control module is
The issuance destination of the voice connection path connection request is a line module that exists at the center base, and is a line module that is connected to the caller telephone, and a remote line module that exists at the remote base, and When it is determined that the remote line module is connected to the call destination telephone, the voice connection path connection request is sent to each of the line module connected to the call source telephone and the remote line module connected to the call destination telephone. Output
The line module connected to the caller telephone forms a voice path connecting the caller telephone and the voice data transmission path based on the voice connection path connection request received from the main control module,
The remote line module connected to the call destination telephone forms a voice path connecting the call destination telephone and the voice data transmission path based on a voice connection path connection request received from the main control module. Call voice exchange system. The call voice exchange system according to claim 3,
Any one of the plurality of line modules has a push button receiver that converts a push button signal output from any one of the telephones into dial information;
The main control module is
When the caller telephone type is identified as a push button telephone based on the received call request and the telephone information, the push button receiver is connected via a line module in which the push button receiver exists. On the condition that the push button receiver is captured, the line module connected to the calling telephone, the line module in which the push button receiver exists, and the switch module voice path respectively. Output connection request,
The line module connected to the caller telephone forms a push button signal transmission voice path connecting the caller telephone and the switch module based on the push button signal voice path connection request received from the main control module. And
The line module in which the push button receiver exists has a push button signal transmission voice path connecting the push button receiver and the switch module based on the push button signal voice path connection request received from the main control module. Forming,
The switch module is a line module in which the push button receiver is provided with a push button signal from a line module connected to the caller telephone, based on a push button signal voice path connection request received from the main control module. A call voice exchange system characterized by forming a push button signal transmission voice path for transferring to a telephone. The call voice exchange system according to claim 6,
Any one of the plurality of line modules or the plurality of remote line modules has a push button receiver that converts a push button signal output from any one of the telephones into dial information,
The main control module is
When the caller telephone type is identified as a push button telephone based on the received call request and the telephone information, the push button receiver is connected via a line module in which the push button receiver exists. On the condition that the push button receiver is captured, the line module connected to the calling telephone, the line module in which the push button receiver exists, and the switch module voice path respectively. Output connection request,
The line module connected to the caller telephone forms a push button signal transmission voice path connecting the caller telephone and the switch module based on the push button signal voice path connection request received from the main control module. And
The line module in which the push button receiver exists has a push button signal transmission voice path connecting the push button receiver and the switch module based on the push button signal voice path connection request received from the main control module. Forming,
The switch module is a line module in which the push button receiver is provided with a push button signal from a line module connected to the caller telephone, based on a push button signal voice path connection request received from the main control module. A call voice exchange system characterized by forming a push button signal transmission voice path for transferring to a telephone. Connected to the IP telephone network through a voice data transmission path for transmitting packetized voice data, and connected to at least a plurality of telephones or a plurality of office lines connected to a public switched telephone network. A plurality of line modules that convert the voice data into time-division voice data;
A switch module connected to each of the voice data transmission path and each line module, for performing voice exchange between specified line modules among the plurality of line modules;
A module connected to the voice data transmission path, wherein the type and location of each telephone is associated with a call request from each telephone, and the telephone number of each telephone is Mainly managing each line module and the switch module as at least a management target based on management information including number information associated with the dial information and call control information for controlling each telephone. A call voice exchange method in a call voice exchange system having a control module,
The main control module is
When a call request is received from the telephone, the type and location of a caller telephone serving as a caller is specified based on the received call request and the telephone information, and the specified call is determined based on the call control information. When call control is performed on the original telephone and dial information is received from the caller telephone, a call destination telephone that is a call destination of the caller telephone is identified based on the received dial information and the number information, Based on the management information related to the specified caller telephone and the callee telephone among the management information, specify the issue destination of the voice connection path connection request, and output the voice connection path connection request to the specified issue destination,
The issuance destination that has received the voice connection path connection request forms at least a part of a voice path that connects the caller telephone and the callee telephone based on the received voice connection path connection request. Call voice exchange method. The call voice exchange method according to claim 9,
The main control module is
The issuance destination of the voice connection path connection request is a line module connected to the caller telephone, and is a line module connected to the callee telephone, and the line modules are the same line module. If determined, output a voice connection path connection request to the same line module,
The same line module forms a voice path connecting the calling telephone and the called telephone in the line module based on the received voice connection path connection request. . The call voice exchange method according to claim 9,
The main control module is
The voice connection path connection request is issued to the line module connected to the caller telephone, the line module different from the line module and connected to the callee telephone, and the switch module. The line connection connected to the caller telephone, the line module connected to the callee telephone, and the switch module to output the voice connection path connection request,
The line module connected to the caller telephone forms a voice path that connects the caller telephone and the switch module based on the voice connection path connection request received from the main control module,
The line module connected to the destination telephone forms a voice path connecting the destination telephone and the switch module based on the voice connection path connection request received from the main control module,
The switch module transfers voice data from the line module connected to the caller telephone to the line module connected to the callee telephone based on the voice connection path connection request received from the main control module. A voice exchange method for calling, characterized in that a voice path is formed. The call voice exchange system according to claim 2,
Each line module is
It is composed of a working line module and a standby line module, and the working line module and the spare line module are connected via a line intersystem confounding path,
The line module that has received the voice connection path connection request, wherein the active line module is:
On the condition that a voice path connecting the caller telephone and the callee telephone is formed, connection information of the active voice path is transferred to the standby line via the line entanglement path for the line modules. Copy to the module,
The backup line module is:
Forming a backup voice path connecting the caller telephone and the callee telephone based on the copied connection information of the active voice path;
The main control module is
After a voice path connecting the caller telephone and the callee telephone is formed, when a failure occurs in the working line module, the working line module is switched to the standby line module, A call voice exchange system, wherein a voice path connecting the call source telephone and the call destination telephone is switched to the backup voice path. The call voice exchange system according to claim 3,
The switch module is
The active switch module and the standby switch module are configured, and the active switch module and the standby switch module are connected via a switch module inter-entanglement path,
The active switch module is
A voice path for transferring voice data from a line module connected to the calling telephone to a line module connected to the called telephone, provided that a working voice path is formed. The connection information of the active voice path is copied to the standby switch module via the interlaced path for the switch module,
The backup switch module is
A voice path for transferring voice data from the line module connected to the caller telephone to the line module connected to the callee telephone based on the copied connection information of the active voice path. To create a backup voice path,
The main control module is
After the working voice path is formed, when a failure occurs in the working switch module, the working switch module is switched from the working switch module to the working switch module. A call voice exchange system, wherein the voice path is switched to the backup voice path. The call voice exchange system according to claim 3,
Each line module is
It is composed of a working line module and a standby line module, and the working line module and the spare line module are connected via a line intersystem confounding path,
A line module connected to the caller telephone, wherein the first line module of the active system is
On the condition that a voice path connecting the calling telephone and the switch module is formed, and the first voice path of the working system is formed, connection information of the first voice path of the working system is obtained as the line module. Copy to the first line module of the standby system via the intersystem confounding path,
The standby first line module is:
Based on the copied connection information of the first active voice path, the voice path connecting the caller telephone and the switch module, forming a first standby voice path;
A line module connected to the destination telephone, wherein the active second line module is:
On the condition that a voice path connecting the destination telephone and the switch module is formed, and the second voice path of the active system is formed, connection information of the second voice path of the active system is obtained as the line module. Copy to the second line module of the standby system via the intersystem confounding path,
The standby first line module is:
Based on the copied connection information of the first active voice path, the voice path connecting the caller telephone and the switch module, forming a first standby voice path;
The standby second line module is:
Based on the copied connection information of the second active voice path, the voice path connecting the destination telephone and the switch module, forming a second standby voice path;
The main control module is
After the first voice path and the second voice path of the working system are formed, if a failure occurs in any one of the working system line modules, the working system line module to the protection system line A call voice exchange system characterized by switching to a module and switching the active first voice path and second voice path to the standby first voice path and second voice path. The call voice exchange system according to claim 4,
Each line module is
It is composed of a working line module and a standby line module, and the working line module and the spare line module are connected via a line intersystem confounding path,
A line module connected to the calling telephone, wherein the active line module is:
On the condition that a voice path linking the caller telephone and the voice data transmission path is formed, connection information of the active voice path is obtained through the line module inter-entanglement path in the standby system. Copy to line module,
The backup line module is:
Based on the copied connection information of the active voice path, forming a backup voice path connecting the caller telephone and the voice data transmission path,
The main control module is
After a voice path connecting the call source telephone and the voice data transmission path is formed, when a failure occurs in the working line module, the working line module is switched to the standby line module. A voice exchange system for voice communication, wherein a voice path connecting the caller telephone and the voice data transmission path is switched to the backup voice path.

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