JP2014042135A - Private branch exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable correction of sound volume on the basis of each user ID, each use location and each call, and to eliminate volume setting when communicating with the same opposite party from the same use location.SOLUTION: A private branch exchange capable of recording a telephone number of an opposite party to communicate with, includes a transmission/reception history function for storing calling/incoming voice level values to manage and correct on the basis of the user ID and the use location. By use of the private branch exchange, at communication with an unspecified opposite party, a transmission voice level value and a reception voice level value are stored in a calling/incoming history and telephone directory memory management unit in the private branch exchange on the basis of the user ID and the use location. At communication with the opposite party of the same telephone number from the same location, communication is made based on the stored transmission and reception voice level values.

Description

  The present invention relates to a private branch exchange and, more particularly, to a private branch exchange that maintains a voice level setting in a telephone terminal.

  As a background art of this technical field, there is Patent Document 1. Patent Document 1 states that “echoes in IP telephone calls vary depending on various factors such as the connection destination, connection route, and user system, and therefore it is necessary to set an eco canceller circuit for each call. Gain adjustment volumes 6 and 7 are provided in the user interface unit, and the user adjusts the volumes 6 and 7 for each call so that the gains of the amplifiers 1 to 4 are variably controlled to suit the user. The setting is made possible, and the setting is stored in the memory linked to the calling number or calling ID, and is read and used in the next and subsequent calls, thereby simplifying the operation. doing.

JP 2008-022182 A

  In the technique of Patent Document 1, the volume setting of the telephone terminal corrected for each call partner is stored in the telephone terminal itself, such as a call history memory and a telephone directory memory. For this reason, in the case of free address operation with user ID login at a CTI (Computer Telephony Integration) call center, etc., in the case of layout change with a seat change function (login with other seats) in a general office, it extends over multiple locations in the IP Centrex configuration. If you use a different physical phone terminal, such as when logging in at another site in the case of operating, or when replacing a terminal when the phone terminal fails, the voice level settings will not be carried over.

  Furthermore, even if the other party has already made a call and set the audio level, the appropriate audio level setting is not maintained unless the user sets the audio level on his / her phone terminal. Volume setting on the phone terminal is essential.

  In addition, there is a case in which an echo is not generated because the user cannot adjust the volume of the telephone terminal and cannot match the eco canceller. Another problem is that it takes time to learn the eco-canceller. That is, there was no sequence for passing the telephone terminal voice level setting value between the telephone terminal itself and the private branch exchange.

  The above-described problems include a plurality of trunk circuits connected to a local line, a plurality of line circuits connected to a telephone, a switch connecting between the line circuits or between the trunk circuit and the line circuit, and the trunk circuit. And a control device that controls the line circuit and the switch, and a memory, and the control unit includes the telephone ID, the telephone type, the telephone usage base, and the telephone A call destination telephone number, a reception voice level of the telephone, and a transmission voice level to the call destination are stored in the memory as a pattern table in association with each other. Referring to the pattern table, this can be achieved by a private branch exchange that sets the received voice level of the telephone to the caller telephone or the callee telephone.

  The voice level correction value is stored in the private branch exchange every time a call is made to an unspecified party. Therefore, in the case of a free address operation using a user ID login at a CTI call center or the like, a seat change function in a general office ( When changing the layout (logged in at other seats), when logging in at another site in the case of operating across multiple sites in an IP Centrex configuration, the phone terminal to be used is physically replaced, such as replacing the phone terminal at the time of failure Even if they are different, since instructions are given to the telephone terminal that uses the previous voice level setting value for each user ID, each login site, and each call destination, the volume operation for each call destination is reduced. Can do.

It is a block diagram of a private branch exchange system. It is a functional block diagram of a private branch exchange. It is a figure explaining the structure of an eco-canceller. It is a figure explaining the mechanism of an eco-canceller. It is a figure explaining an audio | voice level and echo canceller pattern table. It is a sequence diagram with an IP multifunction telephone and a control part. It is an outgoing call sequence figure between a telephone terminal, a private branch exchange, and a trunk. It is an incoming call sequence diagram between a telephone terminal, a private branch exchange, and a trunk. It is a flowchart explaining the process at the time of the transmission of a control part. It is a flowchart explaining the process at the time of an incoming call of a control part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings using examples. The same reference numerals are assigned to substantially the same parts, and the description will not be repeated. In this embodiment, a general private branch exchange and a private branch exchange that holds voice level setting and eco canceller setting in a telephone terminal will be described. However, the exchange is not limited to a private branch exchange.

  A private branch exchange system will be described with reference to FIG. In FIG. 1, the private branch exchange system includes a private branch exchange 100, a base A, a base B, an analog public network 210, a digital public network 220, an analog private line network 230, a digital private line network 240, The WAN 250, the LAN 260, and the communication partner terminal 20 are configured.

  The private branch exchange 100 includes a trunk circuit 110, a trunk circuit 110A, a trunk circuit 110B, a trunk circuit 110C, a line circuit 120, and a line circuit 125. The site A is composed of the multi-function telephone 10, the IP telephone 12, the IP multi-function telephone 300-1, and the LAN 260-A. The site B is composed of an IP multifunction telephone 300-2, a line accommodating device 50, and a LAN 260-B.

  The analog public network 210 connects the trunk circuit 110 to the call partner terminal 20-A and the call partner terminal 20-B. The digital public network 220-1 connects the trunk circuit 110A, the call partner terminal 20-C, and the call partner terminal 20-D. The analog leased line network 230 connects the trunk circuit 110B to the call partner terminal 20-E and the call partner terminal 20-F. The digital leased line network 240 connects the trunk circuit 110C with the call partner terminal 20-G and the call partner terminal 20-H.

  The line circuit 120 accommodates the multifunction telephone 10. The line circuit 125 accommodates the LAN 260-A. The WAN 250 connects the LAN 260-A and the LAN 260-B. The digital public network 220-2 connects the line accommodation device 50 and the call partner terminal 20-I.

  When a call is made from the IP telephone 12 to the call partner terminal 20-A, the user is connected to the call partner terminal 20-A via the private telephone exchange 100 and the analog public network 210 by the dial operation of the IP telephone 12, and the call is made. Is possible. At this time, the received voice level (volume) value is changed by the volume adjustment operation of the IP telephone 12 by the user, and is adjusted to an appropriate voice level. The private branch exchange 100 uses the received voice level value set by the user and the transmitted voice level value set for each outgoing line route as the voice level value, and includes the eco canceller setting value obtained by the previous call. For each user ID, for each calling base, and for each call destination, the information is stored in the memory area. When making a call again with the other party having the same telephone number, the private branch exchange 100 instructs the IP telephone 12 to store the received voice level value. Further, the private branch exchange 100 performs processing based on the stored eco canceller setting value.

  Also, the private branch exchange 100 sets not only the voice level (PAD) value of the user's own past calls, but also the voice level setting for each other party in the same group set in advance as necessary. Value and eco canceller setting value can be applied. As a result, the voice level value and eco-canceller setting value can be shared, and even if the user himself / herself has not made a call, if there is a track record with a member in the same group, the previous call A call can be started with a set value based on the.

  With reference to FIG. 2, functional blocks of the private branch exchange will be described. In FIG. 2, the private branch exchange includes a time division switch (TSW) 130, a control device 140, a storage device 150, an internal bus 160, analog trunk circuits 110 and 110B, a digital trunk circuit 110A, 110C and the IP line circuit 125 are comprised. The control device 140 includes a call control unit 141 and a voice level control unit 142. The storage device 150-1 includes a transmission / reception PAD set value / eco canceller set value memory unit 151, an outgoing / incoming call history / phone book memory unit 152, and a user ID / use base management memory unit 153. . The storage device 150-2 includes a PBX configuration definition memory unit 156. The IP line circuit 125 includes an eco canceller 126.

  The control device 140 executes call control and voice level control. The storage device 150-1 is a memory that is updated for each call. The storage device 150-2 is a memory that holds station data.

  The private branch exchange 100 has analog trunk circuits 110 and 110B connected to an analog network such as an analog station line and an analog dedicated line, and digital trunk circuits 110A and 110C connected to a digital network such as a digital station line and a digital dedicated line. It is mounted on the side.

  An IP line circuit 125 equipped with an eco canceller 126 is mounted on the extension side, and an IP multifunction telephone terminal 300 is connected. Although not shown for simplicity, if the terminal type is an analog terminal, a line circuit for an analog terminal (not equipped with an echo canceller), and if the terminal is a digital multifunction telephone, a line circuit for a digital terminal (not equipped with an echo canceller) In the case of an IP multifunction telephone, an IP telephone terminal line circuit (equipped with an echo canceller) is mounted.

  Note that echo itself also occurs in communication with legacy telephones such as digital multifunction telephones. However, because the delay time is very short, I can hardly notice it because it is masked by my voice. For this reason, eco-cancellers are not implemented in legacy telephone terminal line circuits such as analog terminal line circuits and digital terminal line circuits. On the contrary, in VoIP communication, since the call delay is large, echoes are conspicuous and it may be difficult to hear the other party's voice. For this reason, in an IP phone, echo is generally removed by an eco canceller.

  The TSW 130 performs a bus connection for each call of the extension line and the outside line. Thereby, the telephone call between terminals becomes possible. The sound level control unit 142 corrects the sound level. The user adjusts the received voice level with the volume of the telephone terminal. The transmission voice level is determined by referring to a voice level pattern table held in the PBX configuration definition memory unit 156 and correcting a voice level value for each speech path route. Therefore, the transmission voice level is changed by changing the station data in the PBX configuration definition memory unit. These transmitted voice level and received voice level are collectively referred to as a voice level value. The delay time and echo detection level of the pseudo echo created by the eco canceller are referred to as an eco canceller set value. The private branch exchange 100 stores the voice level value and the eco canceller setting value in the transmission / reception voice level setting value / eco canceller setting value memory unit 151.

  The outgoing / incoming call history / phone book memory unit 152 holds the outgoing / incoming call history and the phone book data. The user ID / use base management memory unit 153 holds a user ID and a use base (IP address). The PBX configuration definition memory unit 156 holds terminal types (IPMFT, MFT, etc.) of subordinate telephones as station data.

  The mechanism of the eco canceller will be described with reference to FIG. In FIG. 3A, the lower left arrow indicates received voice data. On the other hand, the upper right arrow is transmitted voice data. In general, when a transmission / reception signal with two wires is separated into a transmission signal and a reception signal (four wires), an echo is returned due to impedance mismatching or the like. Specifically, the received voice enters the transmitting side and an echo is generated.

  The eco canceller 126 includes an adaptive filter 31 and an adder 32. The adaptive filter 31 delays the received voice data by T (ms) and creates a pseudo echo having the same level as the echo. The adder 32 subtracts the pseudo echo from the audio data before echo cancellation. The eco canceller 126 performs feedback control to cancel the echo. In feedback control, since echo return varies depending on the network configuration, telephone line, and usage environment of each other in a call, an adaptive operation is necessary so that it is always optimal. While the pseudo echo is being created, the learning time of the eco canceller 126 is reached and the echo is not removed.

  The points for creating the pseudo echo are the delay time T (ms) and the echo detection level L (dBm) shown in FIG. 3B. If the other party has the same phone number, the delay time and echo detection level at the time of the call can be stored and applied at the next call with the same party to reduce the eco-canceller learning time. .

  The audio level / echo canceller pattern table will be described with reference to FIG. The voice level / echo canceller pattern table 170 is a table held by the transmission / reception voice level setting value / eco canceller setting value memory unit 151. 4, the voice level / echo canceller pattern table 170 includes a user ID (extension number) 171, a terminal type 172, a group 173, a use base (IP address) 174, a call destination telephone number 175, The received voice level value 176, the transmitted voice level value 178, and the eco canceller setting value 179 are configured. The eco canceller setting value 179 includes a delay time 1791 and an echo detection level 1792.

  A terminal type 172 IPMFT (IP Multi-Function Telephone) is an IP multi-function telephone. On the other hand, MFT is a multifunction telephone that is not IP. Therefore, for MFT, the use base (IP address) 174 and the eco canceller setting value 179 are blank.

  The voice level / echo canceller pattern table 170 includes a received voice level value changed by a user's volume adjustment operation for each call destination using an IP telephone, a transmitted voice level value set by PBX station data, and the previous time. The delay time and echo detection level setting values learned by the eco-canceller during the call are stored and managed. As a result, the next time a call is made to the other party with the same telephone number, the call can be made based on the stored voice level value and eco canceller setting value. Thereby, the volume operation of the user can be reduced and the eco-canceller learning time can be shortened.

  Furthermore, in the case of an IP Centrex configuration in which the use bases are spread over a plurality of places, it is assumed that the type of line used and the outgoing / incoming route differ depending on the use bases. In consideration of this, the received voice level value, the transmitted voice level value, and the eco canceller setting value are different. Even for the same user ID, the received voice level, transmitted voice level, Manage canceller settings. As a result, even when a call is made to the same destination, a call can be made based on the stored voice level value and eco canceller setting value that are different for each use base.

  Also, by managing the group to which it belongs, not only the voice level value of the user's own past calls, but also the voice level setting value for each other party in the same group, It can be applied including canceller setting values. This makes it possible to share the voice level value and eco-canceller setting value, so that even if the user himself / herself has not made a call, if there is a track record with a member in the same group, You can start a call with the set value based on it.

  With reference to FIG. 5, a method for obtaining a user ID and a login site by an IP multifunction telephone will be described. In FIG. 5, since the user logs in from the same type IP multifunction telephone terminal 300 installed in various seats, it is necessary to obtain information such as a login base. When logging in, the user dials the IP multifunction telephone 300 with a special number and an extension number. As a result, the IP multifunction telephone terminal 300 transmits a login request to the control device 140 of the private branch exchange 100 (S11). The IP multifunction telephone terminal 300 transmits a user ID to the control device 140 (S12). The IP multifunction telephone terminal 300 transmits an IP address to the control device 140 (S13). Receiving these messages, the control device 140 refers to and updates information such as the user ID and the base as login information in the user ID / use base management memory unit 153 (S14). Further, the control device 140 refers to the PBX configuration definition in the PBX configuration definition memory unit 156 (S16). The control device 140 transmits to the IP multifunction telephone 300 the user ID and login base of the IP multifunction telephone that has made the login request (S17). The IP multifunction telephone 300 that has received the data holds the memory (S18), and the login is completed.

  With reference to FIG. 6, the outgoing call sequence from an IP multifunction telephone between an IP multifunction telephone, a control device, and a digital trunk circuit will be described. In FIG. 6, the IP multifunction telephone 300 that has detected the off-hook transmits a dial to the control device 140 (S21). The control device 140 transmits to the digital trunk circuit 110C (S22). The control device 140 reads the previous voice level setting value with the other party of the same telephone number (S23). The control device 140 instructs the received IP voice level setting value to the IP multifunction telephone 300 (S24). The control device 140 refers to the PBX configuration definition (station data) and determines the terminal type of the caller telephone (S26). In this case, the terminal type is IP multifunction telephone. The IP multifunction telephone 300 performs received voice level control (S27). In step 23, whether to refer only to past data of the same user or to refer to past data of another person in the same group depends on the contents set in advance by the station data.

  The control device 140 reads the delay time and echo detection level at the time of the previous call with the other party having the same telephone number from the transmission / reception voice level setting value / eco canceller setting value memory unit 151 and instructs the eco canceller 126 ( S28). Here, the digital trunk circuit 110C transmits a response to the control device 140 (S29). The control device 140 controls the transmitted voice level (S31). The control device 140 transmits a response to the IP multifunction telephone 300 (S32).

  During a call, the user changes the voice level value by adjusting the volume of the IP multifunction telephone 300 according to the situation. When the conversation is over and the user performs an on-hook operation, the IP multifunction telephone 300 transmits a call termination disconnection signal to the control device 140 (S33). The control device 140 makes an inquiry about the received voice level value to the IP multifunction telephone 300 (S34). The IP multifunction telephone 300 transmits the changed received voice level value to the control device 140 (S36). The control device 140 records the received voice level in the transmitted / received voice level set value / eco canceller set value memory unit 151 together with the set value of the transmitted voice level control unit (S37). The control device 140 also stores the delay time and echo detection level of the pseudo echo created by the eco canceller 126 in the transmission / reception voice level setting value / eco canceller setting value memory unit 151 (S38). The control device 140 transmits a disconnection to the digital trunk circuit 110C that accommodates the line (S39). The control device 140 transmits a disconnection to the IP multifunction telephone 300 (S41).

  With reference to FIG. 7, an incoming call sequence to the IP multifunction telephone between the IP multifunction telephone, the control device, and the digital trunk circuit will be described. In FIG. 7, the digital trunk circuit 110C notifies the control device 140 of an incoming call (S51). The control device 140 notifies the IP multifunction telephone 300 of the incoming call (S52). The digital trunk circuit 110C notifies the control device 140 of the caller telephone number (S53). It should be noted that the terminal type of the caller is not limited, and the type of extension or external line is not specified. However, it is necessary to notify the other party's telephone number.

  The IP multifunction telephone 300 rings (S54). The control device 140 reads the previous voice level setting value with the other party of the same telephone number (S55). The control device 140 instructs the voice level setting value to the IP multifunction telephone 300 (S56). The IP multifunction telephone 300 performs voice level control of the IP multifunction telephone 300 according to the voice level value instruction from the control device 140 (S57). In step 55, whether only the past data of the same user is referred to or the past data of the other person in the same group is referred to in accordance with the contents set in advance by the station data.

  Also, the control device 140 refers to the PBX configuration definition (station data) and determines the terminal type (S58). The control device 140 reads the delay time and echo detection level at the time of the previous call with the other party having the same telephone number from the transmission / reception voice level setting value / eco canceller setting value memory unit 151 and instructs the eco canceller 126 ( S59). With the off-hook, the IP multifunction telephone 300 transmits a response to the control device 140 (S61). The control device 140 controls the transmitted voice level (S62). The control device 140 transmits a response to the digital trunk circuit 110C (S63) to establish a call.

  During a call, the user changes the voice level value by adjusting the volume of the IP multifunction telephone 300 according to the situation. When the conversation is over and the user performs an on-hook operation, the IP multifunction telephone 300 transmits a disconnection signal to the control device 140 (S64). Receiving the disconnection signal, control device 140 makes an inquiry about the received voice level value to IP multifunction telephone 300 (S66). The IP multifunction telephone 300 transmits the changed received voice level value to the control device 140 (S67). The control device 140 records the received reception voice level in the transmission / reception voice level setting value / eco canceller setting value memory unit 151 together with the transmission voice level setting value (S68). The control device 140 also stores the delay time and echo detection level of the pseudo echo created by the eco canceller 126 in the transmission / reception voice level setting value / eco canceller setting value memory unit 151 (S69). Finally, the control device 140 transmits a disconnection to the digital trunk circuit 110C that accommodates the line (S71). The control device 140 transmits a disconnection to the IP multifunction telephone 300 (S72).

  With reference to FIG. 8, the process of the control device that receives a call from the subordinate IP multifunction telephone will be described. In FIG. 8, the control device 140 receives the dial sent by the user by dialing (S82). The control device 140 refers to the PBX configuration definition memory unit 156 and determines whether to use the past audio level setting data values of others in the same group (S83). When YES, the control device 140 reads the past received voice level value, pseudo echo delay time, and echo detection level (S84). The control device 140 instructs the source IP multifunction telephone 300 on the received voice level value (S86). The control device 140 controls the eco canceller 126 to set the pseudo echo delay time and the echo detection level (S87).

  In step 83, when the other person's past voice level setting data is not used (S83: NO), the control device 140 confirms the presence or absence of the user's own past voice level voice level setting value data (S88). When YES, the control device 140 transitions to step 84. If there is no other party with the same telephone number in step 88 (NO), the control device 140 starts a call with the default volume setting of the telephone body (S89).

  After step 89 or step 87, the caller changes the voice level received voice level value by volume adjustment operation. In addition, the caller ends the conversation and goes on-hook.

  The control device 140 detects on-hook in response to the call termination request (S91). The control device 140 inquires the source IP multifunction telephone 300 about the received voice level value (S92). The control device 140 receives the changed received voice level value from the source IP multifunction telephone 300 (S93). The control device 140 ends the call (S94). The control device 140 updates the received voice level value (S96). The control device 140 updates the eco canceller setting value (S97) and ends.

  With reference to FIG. 9, the process of the control apparatus triggered by an incoming call will be described. In FIG. 9, the control device 140 detects an incoming call (S101). The control device 140 determines whether there is a caller ID notification (S102). When there is a notification (YES), the control device 140 refers to the station data using the caller number as a key and determines whether to use the past voice level value data of others other than the called party (S103). When YES, the control device 140 instructs the incoming IP multifunction telephone 300 about the received voice level value (S104). Further, the control device 140 controls the eco canceller 126 to set the pseudo echo delay time and the echo detection level (S106). When NO in step 103, the control device 140 determines whether to use the past voice level value data of the called party (S107). If YES, the control device 140 transitions to step 104. If NO in step 102 or NO in step 107, control device 140 starts communication with the default value of the receiving level of the receiving terminal (S108).

  After step 108 or step 106, the called party changes the voice level received voice level value by volume adjustment operation. In addition, the callee finishes the conversation and goes on-hook.

  Steps 109 through 116 are the same as steps 91 through 97 in FIG. Further, the call connection processing is not described as a matter well known to those skilled in the art.

  According to the above-described embodiment, the voice level value stored in the call terminal of the specific user ID is set in the grouped same group without setting the volume for each call destination at each phone terminal. The voice level setting value is also applied to the other user ID telephone terminal, and the voice setting level for each login base, the destination telephone number, and the incoming telephone number is instructed. For this reason, even if the other party has never made a call, the call is started with the voice level value set by another person in the same group, and the volume control for each call destination is not performed properly. An audio level is provided, and the audio quality can be improved.

  Further, not only the voice level value of the user ID telephone terminal itself but also the setting value of the eco-canceller of the private branch exchange can be managed and stored in total, and consistency can be achieved, and the eco-canceller learning time can be shortened. For this reason, the user can make a call with an appropriate voice quality in a shorter time.

  20 ... Call partner terminal, 100 ... Private branch exchange, 110 ... Trunk circuit, 120 ... Line circuit, 125 ... IP line circuit, 126 ... Eco canceller, 210 ... Analog public network, 220 ... Digital public network, 230 ... Analog private line Network, 240 ... Digital leased line network, 250 ... WAN, 260 ... LAN.

Claims (3)

A plurality of trunk circuits connected to a local line; a plurality of line circuits connected to a telephone; a switch connecting the line circuits or between the trunk circuit and the line circuit; the trunk circuit and the line circuit; A control device for controlling the switch, and a memory;
The control unit includes the telephone ID, the telephone type, the telephone usage base, the telephone number of the telephone, the incoming voice level of the telephone, and the outgoing voice level to the telephone. Are stored in the memory as a pattern table in association with each other,
The private branch exchange according to claim 1, wherein when a call is made or a call is received, the control unit sets a received voice level of the telephone to a caller telephone or a callee telephone with reference to the pattern table. The private branch exchange according to claim 1,
The line circuit includes an eco canceller,
The pattern table further holds the delay time of the eco canceller and the echo detection level of the eco canceller,
When a call is made or a call is received, the control unit refers to the pattern table and connects the delay time and echo detection level of the eco canceller to the line circuit to which the caller telephone or the callee telephone is connected. A private branch exchange characterized by setting. The private branch exchange according to claim 1 or 2,
The pattern table further holds a telephone group ID,
When a call is made or a call is received, the control unit refers to the pattern table to determine the received voice level of another telephone in the telephone group to which the caller telephone or the callee telephone belongs. A private branch exchange set in a telephone or the called telephone.

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