JP4447534B2 - Subscriber accommodation apparatus, communication processing method, and program - Google Patents

Description

  The present invention relates to a technique for forming a group among a plurality of telephone terminals and making a multi-party call between users in the group.

  As a conventional technique for performing conversation between users of a plurality of telephone terminals, there is a telephone conference system using an existing telephone exchange network. In this teleconference system, teleconference members register in advance, access the teleconference center device when entering the conference, enter a PIN number, etc., and mix multiple telephone lines with the teleconference center device Make a conference call.

  As a three-party call service using a telephone exchange network, there is a triophone service. In the triophone service, a contract user can join a person in a call by dialing the telephone number of a third party who wants to participate in the conversation during a call with a certain party. The triophone service is realized by mixing the communication lines of the three parties with an exchange that accommodates contract users.

There are also multi-party calling technologies using IP phone technology such as push to talk and soft phone. Push to talk provides half-duplex communication using a dedicated terminal, and softphone realizes a conference call by an IP phone application on a user's PC. As an example of a telephone conference system using IP telephone technology, there is a technology disclosed in Patent Document 1.
JP 2004-328526 A

  However, the above telephone conference system using an existing telephone exchange network has a high realization cost because a plurality of telephone lines are mixed by an expensive dedicated telephone conference center apparatus, and thus the usage fee is high. In addition, prior user registration and identification number input are required to identify the user, and there is no flexibility in having a conversation with a plurality of people when they think of it. In addition, since the triophone service performs line mixing with an exchange of a telephone exchange network, it cannot be easily realized, and there is a problem that the realization cost is expensive.

  In addition, there is a problem that a multi-party call cannot be realized using an existing telephone terminal that is generally used with an IP telephone technology such as push-to-talk or soft phone.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a technique for easily realizing multi-party calls without using a special device dedicated to multi-party calls on the network side and the user side. To do.

  The above problem is that the voice signal received from the means for connecting to the subscriber line, the means for connecting to the VoIP network, and the first telephone terminal connected to the subscriber line is converted into a voice packet and transmitted to the VoIP network. And a subscriber accommodation device comprising means for converting a voice packet received from the VoIP network into a voice signal and transmitting the voice signal to the first telephone terminal, between the first telephone terminal and the second telephone terminal. In a state where the first VoIP communication path for a call is set, after receiving the first signal from the first telephone terminal, the telephone number of the third telephone terminal is received from the first telephone terminal. By means of this, the means for setting the second VoIP communication path for the call between the first telephone terminal and the third telephone terminal, and the first telephone terminal after the second VoIP communication path is set The first signal is received by receiving the first signal. It can be solved by a subscriber accommodating apparatus which is characterized in that a VoIP call path and means for closing the second, respectively, respectively of VoIP speech path voice packet receiving port.

  The subscriber accommodation device transmits to the subscriber accommodation device that accommodates the third telephone terminal a signal that indicates that the voice packet reception port is blocked and includes the connection destination information for the second telephone terminal. Means to do this may be provided. The subscriber accommodation apparatus that has received this signal can set a communication path with the subscriber accommodation apparatus that accommodates the second telephone terminal.

  The first signal is received from the first telephone terminal in a state where the first VoIP communication path and the second VoIP communication path are set and the respective voice packet reception ports are blocked. To connect the upstream path from the first telephone terminal to the PB signal receive trunk, and open the voice packet reception ports of the first VoIP communication path and the second VoIP communication path, respectively. Means for closing each voice packet transmission port may be provided. As a result, the first telephone terminal can only receive voice.

  In the above state where the upstream path from the first telephone terminal is connected to the PB signal receive trunk, the upstream path from the first telephone terminal is received by receiving the second signal from the first telephone terminal. There may be provided means for switching the path between the first VoIP communication path and the second VoIP communication path, and opening the voice packet transmission port of each of the first VoIP communication path and the second VoIP communication path. . As a result, the state in which only audio reception is performed transitions to a state in which audio transmission is performed.

  Further, in the above state where the upstream path from the first telephone terminal is connected to the PB signal receive trunk, when a signal indicating that the voice packet transmission port is opened is received from another subscriber accommodation device, Means may be provided for fixing the upstream path from one telephone terminal to the PB signal receive trunk. Thereby, it can prevent that a state changes with respect to operation while another user is talking.

  In the above state where the upstream path from the first telephone terminal is connected to the PB signal receiving trunk, the upstream path from the first telephone terminal is received by receiving the third signal from the first telephone terminal. A third VoIP for a call between the first telephone terminal and the fourth telephone terminal by disconnecting the path from the PB signal receive trunk and receiving the telephone number of the fourth telephone terminal from the first telephone terminal. By setting the speech path and receiving the first signal from the first telephone terminal, the fourth telephone terminal accommodates the signal including the connection destination information to the second telephone terminal and the third telephone terminal. Means for transmitting to the subscriber accommodation device may be provided. As a result, the fourth telephone terminal can participate in the conversation.

  In addition, in a state where the voice packet reception ports of the first VoIP communication path and the second VoIP communication path are opened and the respective voice packet transmission ports are blocked, the first VoIP communication path or By receiving a signal indicating that the voice packet transmission port has been closed from the open state in the other subscriber accommodation device connected to the second VoIP communication path, the first telephone terminal There may be provided means for transmitting a sound indicating that the accommodation telephone terminal of the other subscriber accommodation device is waiting for reception.

  The present invention also provides a means for connecting to a subscriber line, a means for connecting to a VoIP network, and a voice signal received from a first telephone terminal connected to the subscriber line into a voice packet to be converted into a VoIP network. A subscriber accommodation apparatus comprising means for transmitting and converting voice packets received from the VoIP network into voice signals and transmitting the voice packets to the telephone terminal is provided for a call between the first telephone terminal and the second telephone terminal. In the state where the first VoIP communication path is set, by receiving the telephone number of the third telephone terminal from the first telephone terminal after receiving the first signal from the first telephone terminal, Means for setting a second VoIP communication path for a call between the first telephone terminal and the third telephone terminal; after the second VoIP communication path is set, the first signal from the first telephone terminal By receiving the first VoI It can be configured as a communication channel and the second VoIP communication path means for closing the respective Each voice packet receiving port of a program to function as a.

  According to the present invention, a voice signal received from a telephone terminal connected to a subscriber line is converted into a voice packet and transmitted to the VoIP network, and a voice packet received from the VoIP network is converted into a voice signal and transmitted to the telephone terminal. Since the subscriber accommodation device is used for transmission, it is possible to easily realize multi-party calls compared to existing teleconference systems without using special devices dedicated to multi-party calls on the network side and user side. it can.

  Embodiments of the present invention will be described below with reference to the drawings.

[overall structure]
FIG. 1 shows a system configuration in the embodiment of the present invention. As shown in FIG. 1, the system of the present embodiment has a configuration in which subscriber accommodation devices 5 to 8 that accommodate telephone terminals 1 to 4 are connected via a VoIP network 9. The telephone terminal in this embodiment is a general telephone used for an analog line, and has a function of transmitting a PB signal (DTMF signal) by operating a push button. The telephone terminals 1 to 4 are used by users A to D, respectively.

  Each subscriber accommodation apparatus is an apparatus for connecting an existing analog telephone subscriber line and the VoIP network 9 and providing an IP voice call service via the VoIP network 9 to the existing analog telephone subscriber. As described above, the subscriber accommodation device itself, which is located between the analog telephone subscriber line and the VoIP network and provides a voice call service via the VoIP network to the subscriber, is an existing technology. In this embodiment, an example is described in which an analog line is used as the subscriber line shown in FIG. 1, but the present invention can also be applied to a case where a digital line is used as the subscriber line. The “subscriber line” in this specification and claims includes a line connecting a device installed in a home and a telephone terminal.

  Each subscriber accommodation device converts a voice signal received from a telephone terminal into an IP packet for the VoIP network and vice versa, a function for establishing an IP call session between subscriber accommodation devices, and use A function of interpreting a PB signal sent from a person's telephone terminal, and a function of issuing a signal (ringing sound or the like) similar to that of a normal analog telephone to the telephone terminal according to the state of the call session. Further, the subscriber accommodation device of the present embodiment has a function for realizing the multi-party call described in the present embodiment. A subscriber accommodation device is installed in a building in which a subscriber exchange is installed in a telephone exchange network, for example, and is a line conventionally used for a call in a telephone exchange network as a line between the subscriber accommodation device and a telephone terminal. Can be used as is. The VoIP network 9 includes a CA (call agent) 10 that controls an IP call as its main component device.

[Operation overview]
A multi-party call method using the above system will be described with reference to the sequence chart of FIG. The sequence chart of FIG. 2 mainly shows the operation contents of the users A to C. Further, the “system” in FIG. 2 is a system including subscriber accommodation devices 5 to 8 connected to the VoIP network 9. The processing in the present embodiment is mainly performed by the subscriber accommodation device, and the detailed operation of each subscriber accommodation device will be described later. Note that communication is performed between B and C and between A and D in the same way as between A and B, but from the viewpoint of easy understanding of the figure, in the sequence chart of FIG. The description of “system” is omitted.

  First, assume that A and B are busy. Here, it is assumed that A decides to join C in the conversation, and the operation for that purpose will be described below.

  A first presses the hook button of the telephone terminal 1 and immediately releases it (step 1). Hereinafter, this operation is referred to as hooking. A signal sent from the telephone terminal by the hooking operation is called a hooking signal. A hooking signal is transmitted to the system by hooking, and the system that has received the hooking signal places the call between A and B on hold, sends a hold sound to the telephone terminal 2 of B (step 2), and calls the phone of A. A new dial standby state from the terminal 1 is entered.

  When A dials C's telephone number (step 3), the system receives the dial signal, rings the telephone terminal 3 by making an incoming call to C's telephone terminal 3 (step 4), and calls A's telephone. A ringing tone is transmitted to the terminal 1 (step 5). When C picks up the handset of the telephone terminal 3, a call between A and C is started (step 6).

After a call between A and C, A performs hooking (step 7). By hooking, the system controls so that a one-way call from A to B and a one-way call from A to C are performed (step 9). At this point, A has the right to send. In addition, the system establishes a communication session between C and B, triggered by a hooking signal sent from the telephone terminal 1 of A, but is set not to transmit / receive voice packets. The establishment of a communication session between C and B in FIG. 2 is that between the subscriber accommodation device 7 that accommodates the C telephone terminal 3 and the subscriber accommodation device 6 that accommodates the B telephone terminal 2, The establishment of a communication session for communication between the telephone terminals 2 is expressed as establishment of a communication session between C and B from the viewpoint of easy understanding. Hereinafter, this expression is used as appropriate. The establishment of a communication session between the subscriber accommodation device 7 and the subscriber accommodation device 6 is information necessary for transmission / reception of RTP packets for specific communication between the subscriber accommodation device 7 and the subscriber accommodation device 6. Is obtained by the subscriber accommodation device 7 and the subscriber accommodation device 6 using the SIP protocol, for example. By establishing the communication session, a virtual communication path is established between the subscriber accommodation device 7 and the subscriber accommodation device 6. Hereinafter, the term “call path” will be used as appropriate. In addition, opening the RTP port may be expressed as opening a communication path, and closing the RTP port may be expressed as blocking the communication path.

  In a one-way call from A to B and C (step 9), A speaks, for example, “Can you hear Mr. B and Mr. C” and performs hooking (step 10). The system that has received the hooking signal blocks A's transmission path (blocks the transmission RTP port of the communication path) (step 11), and makes A ready for reception. In addition, a sound indicating that the transmission path of A is blocked (A has abandoned the right to send) is transmitted to the telephone terminal 2 of B and the telephone terminal 3 of C (step 12). Thereby, B and C recognize that the opportunity to transmit has arisen.

  Here, it is assumed that B returns a response. B presses the * button on the telephone terminal 2 (step 13). The system that has received the * button opens B's transmission path (opens a transmission RTP port) (step 14), and enables transmission from B to A and C (step 15). In addition, even if the * button is pressed from A, the system ignores the * button operation from A because B has already acquired the right to make a call. The same applies to C.

  B hooks when she finishes talking. By hooking, the same processing as in step 11 and step 12 is performed, returning to the state immediately before step 13, and then the person who pressed the * button acquires the right to make a call. In addition, the user leaves the multi-party call by placing the handset.

  Hereinafter, a case where A joins D in a conversation while three parties are participating in a call will be described with reference to FIG. In FIG. 3, as an example, it is assumed that the state is between step 12 and step 13 in FIG.

  First, A presses the # button. (Step 20). The system that has received the # button signal enters a new dial waiting state for A. Subsequently, A dials the telephone number of D (step 21). The system receives an incoming call to D, rings the telephone terminal 4 of D (step 22), and sends a ringing tone to the telephone terminal 1 of A (step 23). D picks up the handset and talks to A (step 24). At this time, B and C maintain a multi-party call. A then returns to the initial state of FIG. 3 with respect to A, B, and C by hooking. In response to a hooking signal from A, a communication session between D and B / C is established, and a reception port is established. Thereafter, as in the procedure of FIG. 2, the person who wants to acquire the transmission right presses the * button to transmit a speech. Further, it is possible to increase the number of participants to 5, 6,... By the same operation as described above.

[Configuration of subscriber accommodation device]
The functional configuration of the subscriber accommodation device will be described below with reference to the block diagram of FIG. As shown in FIG. 4, the subscriber accommodation device 20 according to the present embodiment includes an analog interface unit 21 that transmits and receives analog signals, a call control unit 22 that performs processing for establishing an IP call session in the VoIP network 9, and VoIP. It has a call processing control unit 23 that performs call processing and multi-party call processing via the network, and an IP interface unit 24 that transmits and receives IP packets to and from the VoIP network 9.

  The analog interface unit 21 has an A / D and D / A conversion function for converting between an analog signal and a digital signal, and the call processing control unit 23 receives a PB signal from the telephone terminal and determines the type of the PB signal. It has a PB signal receiving trunk (abbreviated as PBR) having a function of discriminating, and a reserved sound source. The call processing control unit 23 also includes a function for performing conversion between a voice signal and an IP packet, a function for performing input / output line control such as connection between a subscriber line and an IP call session, and the like. The call control unit 22 has a function of performing call control processing based on, for example, SIP.

  The subscriber accommodation device 20 can be realized by using, for example, a device in which a line interface is mounted on a computer having a CPU, a storage device, and the like. In this case, the multi-party call control program according to the present embodiment is installed. Each means of the present invention can be realized by executing this program. In addition, among the functions in the call processing control unit 23, a function for packetizing voice, a sound source, and the like can be realized using a dedicated digital circuit.

[Details of operation of subscriber accommodation device]
The operation of the subscriber accommodation device having the above configuration will be described below with reference to the flowcharts of FIGS. Also, FIG. 10 to FIG. 18 show the state of the line connection state, the communication session, etc. in correspondence with the procedure of the flowchart. 10 to 18 showing a communication session or the like, a pipe shown in a columnar shape in the subscriber accommodation device indicates that a communication path is established with another subscriber accommodation device. The dialog ID is an identifier for identifying a specific speech path, and is assigned and notified by the CA 10 in the course of establishing the speech path.

  FIG. 5 is a flowchart showing the operation of the subscriber accommodation device 5 that accommodates A when A newly joins C during a call with B. The operation will be described along this flowchart.

  First, it is assumed that A and B are in a call state (step 31). In this case, as shown in FIG. 10, a communication session for voice communication is established between the subscriber accommodation devices 5 and 6, and RTP packets are transmitted and received.

  Next, when the subscriber accommodation device 5 receives a hooking signal via an analog line to which the telephone terminal 1 of A is connected in accordance with the hooking of A (step 32), the communication path to B is set to the subscriber of A. Instead of the line, a connection is made to the reserved sound source (step 33). Then, a dial signal from the telephone terminal 1 is waited. When the C telephone number is received from the telephone terminal 1 (Yes in step 34), the telephone terminal 1 and the telephone terminal are exchanged with the subscriber accommodation apparatus 7 accommodating the C telephone terminal 3 in the normal call control procedure. A VoIP communication session for communication between the three is established (step 35), and a call between A and C becomes possible. The state at this time is shown in FIG. FIG. 11 illustrates a state in which a communication session identified by the dialog ID: 12346 is established and a call is performed between A to C.

  Next, from the state shown in FIG. 11, when the subscriber accommodation device 5 receives a hooking signal via the analog line of A along with A's hooking (step 36), as shown in FIG. The accommodation apparatus 5 switches the call path to B from the reserved sound source to the A line, and shifts to half-duplex communication from A to B / C (step 37). That is, by blocking the RTP port on the receiving side of the communication path between A and B / C in the subscriber accommodation device 5, the RTP packet flows only from A to B and C. The RTP packet is transmitted to both the subscriber accommodation apparatuses 6 and 7 by unicast.

  Further, the subscriber accommodation device 5 transmits a signal indicating that the RTP port on the receiving side is blocked to the subscriber accommodation devices 6 and 7 that accommodate B and C (step 38). This signal includes connection destination information (telephone number and the like) to B that was initially calling A, and the subscriber accommodation device 7 accommodates B when this signal is received. Call control is performed so as to establish a communication session for a call between C and B with the subscriber accommodation device 6. The above signal is a kind of call control signal, and signal generation and transmission / reception can be performed by the function of the call control unit 22. Although a communication session is established here, the transmission / reception RTP port is blocked, and no audio transmission / reception is performed between B and C. FIG. 13 shows the current state. As shown in FIG. 13, voice packets are transmitted in one direction from A to B / C, but voice packets are not transmitted and received between B and C.

  When A finishes talking to B / C and performs hooking, the subscriber accommodation device 5 receives the hooking signal (step 39) and connects the upstream path from A to the PB signal receiving trunk (PBR). (Step 40), the transmission RTP port in the communication session established for the B / C subscriber accommodation devices 6 and 7 is blocked, and the reception RTP port is opened (Step 41). And the signal which shows that is notified to the subscriber accommodation apparatuses 6 and 7 (step 42).

  FIG. 6 shows an operation flowchart of the subscriber accommodation device (6, 7) that has received the signal transmitted in step 42 of FIG. As shown in FIG. 6, when the above signal is received (step 51), the upstream path from the subscriber is switched to PBR (step 52). At this time, the user (B / C) is notified by sound that A has been waiting for reception from transmission (step 53). As this sound, for example, HST (holding tone), IIT (incoming call display tone) or the like can be used. The state at this time is shown in FIG. As shown in FIG. 14, all of A / B / C are in a state where the upstream path is connected to the PBR, and only the downstream path is connected. Each subscriber accommodation device monitors a PB signal from the corresponding subscriber.

  Next, assuming that B speaks, the operation of the subscriber accommodation device 6 that accommodates B will be described along the procedure of the flowchart of FIG.

  In the state shown in FIG. 14, the subscriber accommodation device 6 receives the * signal from the B telephone terminal 2, and the PBR detects the * signal (step 61). The subscriber accommodation device 6 switches the uplink path from B to the two already established speech paths and opens transmission RTP ports for both speech paths (step 62). And the signal which shows having opened the transmission RTP port is transmitted to the subscriber accommodation apparatuses 5 and 7 corresponding to A / C (step 63). The subscriber accommodation devices 5 and 7 may transmit to B and C a sound indicating that B has acquired the right to transmit. The state at this time is as shown in FIG.

  The subscriber accommodation device (5, 7) that has received the signal fixes the upstream path to the PBR. That is, even if a * signal is received from the user's telephone terminal at this time, an error sound is transmitted without changing the state.

  If B speaks at this point, the transmission RTP packet is sent to the corresponding port of the subscriber accommodation devices 5 and 7, and the A / C can hear B's speech. In order to prevent the transmission right from being held, RTP may be monitored by RTPC, and the right may be released when there is no transmission for a certain period of time.

  When B finishes talking and B performs hooking, the subscriber accommodation device 6 receives the hooking signal (step 64), performs the same processing as steps 40 to 42 of FIG. 5, and returns to the state of FIG. Thereafter, when the person who wants to talk presses the * button, half-duplex communication is performed, and when the hooking is pressed, the operation of returning to the state of FIG. 14 is repeated.

  Next, the operation of the subscriber accommodation device 5 in the case of adding a new participant from the state of FIG. 15 which is the listening side state of A will be described along the procedure of the flowchart of FIG.

  When A presses the # button to join D, the PBR of the subscriber accommodation device 5 detects the # signal from A (step 71). Then, the subscriber accommodation device 5 enters preparation for establishment of a call session (step 72), and receives the telephone number of D from A and receives between D and the subscriber accommodation device 8 that accommodates D. A call session is established for the call (step 74). The state at this time is shown in FIG.

  When the conversation between A and D ends and the subscriber accommodation device 5 receives the hooking signal from A (step 75), the uplink path from A is switched to PBR (step 76). Further, in a communication session related to communication between A and D between the subscriber accommodation device 5 and the subscriber accommodation device 8, the transmission RTP port of the communication session between A and D is blocked and a reception RTP port is opened ( Step 77), a signal indicating that is transmitted to the subscriber accommodation device 8 (step 78).

  The subsequent operation of the subscriber accommodation device 8 will be described with reference to the flowchart of FIG.

  The subscriber accommodation device 8 receives the above signal (step 81), and connects the upstream path from D to the PBR (step 82). This state is shown in FIG. The signal includes connection information (telephone number) to the B / C, and the subscriber accommodation device 8 establishes a communication session with the B / C using the connection destination information. A reception RTP port from B / C is opened (step 83). Further, in the subscriber accommodation device 6, a transmission RTP port of a communication path for communication between B to D is opened. Thereby, as shown in FIG. 18, A, C, and D can hear B's talk.

  In the present embodiment, the subscriber accommodation apparatus installed in the telephone exchange is taken as an example. However, the function described in the present embodiment is applied to an apparatus installed in a home such as an IP-PBX or an IP telephone adapter. By installing it, it is possible to realize multi-party calls.

  As described above, the multi-party call can be easily realized without using a special device by the technique described in this embodiment. Further, multi-party calls can be realized without using a device that is complicated and expensive to manage such as a telephone line mixing device.

  Furthermore, in the conventional technology, if conversations are made simultaneously on multiple lines, the sound of the speaker overlaps and cannot be heard, or the background noise of individual callers is superimposed and the quality deteriorates, and the call voice cannot be heard. Was. For this reason, unless a telephone having a mute function is used so that unnecessary sounds such as background noise are not used, a conversation with high quality cannot be performed. On the other hand, according to the technology described in the present embodiment, since voice transmission control is performed to prevent sound overlap and background noise from entering, it is possible to ensure sufficient quality even with a telephone that does not have a mute function. A comfortable call can be realized.

  The present invention is not limited to the above-described embodiment, and various modifications and applications can be made within the scope of the claims.

It is a system configuration figure in an embodiment of the invention. It is a sequence chart (1) which shows the operation | movement outline | summary of the system in embodiment of this invention. It is a sequence chart (2) which shows the operation | movement outline | summary of the system in embodiment of this invention. It is a functional block diagram of a subscriber accommodation apparatus. It is a flowchart (1) which shows operation | movement of a subscriber accommodation apparatus. It is a flowchart (2) which shows operation | movement of a subscriber accommodation apparatus. It is a flowchart (3) which shows operation | movement of a subscriber accommodation apparatus. It is a flowchart (4) which shows operation | movement of a subscriber accommodation apparatus. It is a flowchart (5) which shows operation | movement of a subscriber accommodation apparatus. It is a figure (1) for demonstrating the state transition of a subscriber accommodation apparatus. It is FIG. (2) for demonstrating the state transition of a subscriber accommodation apparatus. It is FIG. (3) for demonstrating the state transition of a subscriber accommodation apparatus. It is FIG. (4) for demonstrating the state transition of a subscriber accommodation apparatus. It is a figure (5) for demonstrating the state transition of a subscriber accommodation apparatus. It is a figure (6) for demonstrating the state transition of a subscriber accommodation apparatus. It is a figure (7) for demonstrating the state transition of a subscriber accommodation apparatus. It is a figure (8) for demonstrating the state transition of a subscriber accommodation apparatus. It is a figure (9) for demonstrating the state transition of a subscriber accommodation apparatus.

Explanation of symbols

1-4 Telephone terminals 5-8, 20 Subscriber accommodation device 9 VoIP network 10 CA
21 Analog interface unit 22 Call control unit 23 Call processing control unit 24 IP interface unit

Claims (9)

A means for connecting to the subscriber line, a means for connecting to the VoIP network, and a voice signal received from the first telephone terminal connected to the subscriber line is converted into a voice packet and sent to the VoIP network. A subscriber accommodation device comprising means for converting a received voice packet into a voice signal and transmitting the voice signal to a first telephone terminal,
In a state where the first VoIP communication path for the call between the first telephone terminal and the second telephone terminal is set, the first telephone is received after receiving the first signal from the first telephone terminal. Means for setting a second VoIP communication path for a call between the first telephone terminal and the third telephone terminal by receiving the telephone number of the third telephone terminal from the terminal;
By receiving the first signal from the first telephone terminal after the second VoIP communication path is set, each of the first VoIP communication path and the second VoIP communication path receives voice packets. And a means for closing the port.   And a means for transmitting a signal including connection destination information to the second telephone terminal to a signal indicating that the voice packet receiving port is blocked to a subscriber accommodation apparatus accommodating the third telephone terminal. 1. The subscriber accommodation device according to 1.   By receiving the first signal from the first telephone terminal in a state where the first VoIP communication path and the second VoIP communication path are set and the respective voice packet reception ports are blocked, The upstream path from the first telephone terminal is connected to the PB signal receive trunk, and the voice packet reception ports of the first VoIP communication path and the second VoIP communication path are opened, respectively. The subscriber accommodation apparatus according to claim 1, further comprising means for closing the voice packet transmission port.   In a state where the upstream path from the first telephone terminal is connected to the PB signal receive trunk, the upstream path from the first telephone terminal is received by receiving the second signal from the first telephone terminal. 4. The apparatus according to claim 3, further comprising means for switching between the first VoIP communication path and the second VoIP communication path and opening the voice packet transmission port of each of the first VoIP communication path and the second VoIP communication path. The subscriber accommodation device as described.   When the upstream path from the first telephone terminal is connected to the PB signal receive trunk and receives a signal indicating that the voice packet transmission port has been opened from another subscriber accommodation apparatus, the first telephone terminal 4. The subscriber accommodation apparatus according to claim 3, further comprising means for fixing an upstream path from the PB signal receiving trunk.   In the state where the upstream path from the first telephone terminal is connected to the PB signal receive trunk, the upstream path from the first telephone terminal is received by receiving the third signal from the first telephone terminal. A third VoIP communication path for a call between the first telephone terminal and the fourth telephone terminal by disconnecting from the PB signal receive trunk and receiving the telephone number of the fourth telephone terminal from the first telephone terminal And receiving the first signal from the first telephone terminal, the subscriber who accommodates the fourth telephone terminal with a signal including connection destination information to the second telephone terminal and the third telephone terminal. 4. The subscriber accommodation device according to claim 3, further comprising means for transmitting to the accommodation device.   In a state where the voice packet reception ports of the first VoIP communication path and the second VoIP communication path are opened and the respective voice packet transmission ports are blocked, the first VoIP communication path or the second VoIP communication path By receiving a signal indicating that the voice packet transmission port has been closed from the open state in the other subscriber accommodation device connected to the VoIP communication path of 2. The subscriber accommodation device according to claim 1, further comprising means for transmitting a sound indicating that the accommodation telephone terminal of the subscriber accommodation device is waiting for reception. A means for connecting to the subscriber line, a means for connecting to the VoIP network, and a voice signal received from the first telephone terminal connected to the subscriber line is converted into a voice packet and sent to the VoIP network. A communication processing method in a subscriber accommodation device comprising means for converting a received voice packet into a voice signal and transmitting it to a first telephone terminal,
In a state where the first VoIP communication path for the call between the first telephone terminal and the second telephone terminal is set, the first telephone is received after receiving the first signal from the first telephone terminal. Setting a second VoIP communication path for a call between the first telephone terminal and the third telephone terminal by receiving the telephone number of the third telephone terminal from the terminal;
By receiving the first signal from the first telephone terminal after the second VoIP communication path is set, each of the first VoIP communication path and the second VoIP communication path receives voice packets. A communication processing method comprising: a step of closing the port. The means for connecting to the subscriber line, the means for connecting to the VoIP network, and the voice signal received from the first telephone terminal connected to the subscriber line are converted into voice packets and sent to the VoIP network. A subscriber accommodation device comprising means for converting a received voice packet into a voice signal and transmitting the voice signal to the telephone terminal;
In a state where the first VoIP communication path for the call between the first telephone terminal and the second telephone terminal is set, the first telephone is received after receiving the first signal from the first telephone terminal. Means for setting a second VoIP communication path for a call between the first telephone terminal and the third telephone terminal by receiving the telephone number of the third telephone terminal from the terminal;
By receiving the first signal from the first telephone terminal after the second VoIP communication path is set, each of the first VoIP communication path and the second VoIP communication path receives voice packets. Means to block the port;
Program to function as.

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