JP4924156B2 - Button telephone equipment - Google Patents

Description

  The present invention relates to a key telephone apparatus, and more particularly to a key telephone apparatus capable of releasing a hold by a held telephone that is held by a hold operation of the key telephone during an outside line call.

  Conventionally, in a multi-function telephone system such as a key telephone device, when a hold operation is performed on a telephone during an external line call, a hold sound is sent to the external line, and the telephone receiver or speaker of the external line connection destination telephone that is the hold side Will output a hold tone. When the hold release operation is performed on the telephone on the hold side, the hold sound is stopped and the call can be resumed (see Patent Document 1).

  However, in the conventional multi-function telephone system, the held side must wait for the hold sound to stop until the hold is released on the hold side. For this reason, if the user on the hold side leaves the telephone in the event of an emergency, he / she will be late for the response because he / she is not in time for releasing the hold if he / she answers the call after completing his / her duties.

JP-A-11-261705 (paragraphs 0003 to 0006)

  The present invention has been made in view of such problems, and an object of the present invention is to make it possible to release a hold by a held-side telephone held by a hold operation of a key telephone during an outside line call. .

According to a first aspect of the present invention, there is provided a key telephone apparatus having a plurality of button telephones, the means for holding the external line call in response to the hold operation of the key telephone during an external line call, and the extension call operation following the hold operation And a means for connecting the hold-side telephone to the callee key telephone when a connection request is received from the hold-side telephone during the extension call by the means. It is characterized by having.
A second aspect of the present invention, there is provided a key telephone system having a plurality of key telephone sets, and means to hold the external call in accordance with a hold operation of said key telephone in external call, extension transfer following said hold operation A means for forcibly transferring to the extension transfer destination in response to an operation, and when a connection request is received from the hold-side telephone during transfer by the means, the hold-side telephone and the transfer destination key telephone And means for connecting.

(Function)
According to the first aspect of the present invention, the outside line call is put on hold in response to the hold operation of the key telephone during an outside line call, the extension call is made in response to the extension call operation following the hold operation, and the held side is called during the extension call. When the connection request is received from the other telephone, the held telephone and the extension telephone button telephone are connected.
According to the invention of claim 2, pending the external call in accordance with a hold operation of the key telephone in external call, to force transfer in accordance with the extension transfer operation following the hold operation, holdee during forced transfer When the connection request is received from the other telephone, the held-side telephone and the transfer destination button telephone are connected.

  According to the present invention, it is possible to release a hold by a held-side telephone that is held by a hold operation of a key telephone during an outside line call.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a communication system having a key telephone apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, a communication system according to an embodiment of the present invention includes an IP (Internet Protocol) network 1 and IP telephone terminal devices that can communicate with each other via the IP network 1 (hereinafter, the terminal device is referred to as a terminal). ) 2-6, a router 7 for connecting the IP telephone terminals 3, 4 to the IP network 1, a router 8 for connecting the IP telephone terminals 5, 6 to the IP network 1, and an IP Centrex server 9 Have.

  This communication system is configured as a key telephone device using IP Centrex. IP Centrex is an IP telephone service for corporations provided by a telecommunications carrier, and is a system that installs an IP Centrex server in place of PBX (Private Branch Exchange) and a main device to control calls.

  Here, the extension numbers are set in advance so that the IP telephone terminals 3 to 6 function as extension telephones, and the IP addresses of the routers 7 and 8 are set. Further, the IP telephone terminals 3 and 4 connected to the router 7 and the IP telephone terminals 5 and 6 connected to the router 8 are set to form one group. The setting information is stored in the setting information storage unit 92 in the IP Centrex server 9, and each IP telephone terminal 2 to 6 uses the SIP (Session Initiation Protocol) by the IP Centrex server 9 according to the setting information. By the call connection control, the extension line call and the outside line call via the IP network 1 become possible. It is also possible to set the IP telephone terminals 3 and 4 belonging to one group to ring when a call is received on a certain line and to ring the IP telephone terminals 5 and 6 belonging to another group when a call is received on another line. it can.

  In addition to the setting information storage unit 92 described above, the IP Centrex server 9 includes a hold management unit 91 that manages a hold state of the IP telephone terminals 3 to 6 that function as extension telephones, and a call state in each IP telephone terminal 3 to 6 A terminal state information storage unit 93 for storing (incoming call, on hold, transferring) and the like.

  Next, an example of a procedure from when the pair of IP telephone terminals in the communication system shown in FIG. 1 starts to finish the outside line call will be described with reference to FIG. In this figure, the originating IP telephone terminal 21 is the IP telephone terminal 2 in FIG. 1, and the receiving IP telephone terminal 22 is one of the IP telephone terminals 3 to 6 in FIG. In the following description, the description of going through the router 7 or 8 is omitted.

  First, the IP telephone terminal 21 sends an “INVITE (call request)” message to the IP Centrex server 9 in response to a user's call operation (step S1). The IP Centrex server 9 checks the received “INVITE (call request)” message, and sends out a “100 TRYING (notification in progress)” message to notify the IP telephone terminal 21 that the call request has been received ( Procedure S2). In addition, the IP Centrex server 9 transmits an “INVITE (call request)” message to the IP telephone terminal 22 that is the call destination (step S3).

  The IP telephone terminal 22 that has received the “INVITE (call request)” message sends out a “100 TRYING (in-process notification)” message to notify the IP Centrex server 9 that it has been received (step S4). Next, the IP telephone terminal 22 transmits a “180 RINGING (calling notification)” message indicating that a call is being made (step S5), and outputs a ringing tone due to ringing.

  Upon receiving the “180 RINGING (calling notification)” message, the IP Centrex server 9 notifies the IP telephone terminal 21 that the IP telephone terminal 22 is being called. Notification) "message is transmitted (step S6). The IP telephone terminal 21 outputs a ringback tone based on the reception of the “180 RINGING (calling notification)” message.

  The IP telephone terminal 22 sends out a “200 OK (incoming response)” message to the IP Centrex server 9 in order to stop the output of the ringing tone based on the response operation of the user and notify that the incoming call has been answered ( Procedure S7).

  The IP Centrex server 9 that has received the “200 OK (incoming response)” message transmits the “200 OK (incoming response)” message to the IP telephone terminal 21 (step S8). The IP telephone terminal 21 that has received the “200 OK (incoming response)” message sends an “ACK (acknowledgment response)” message to the IP Centrex server 9 (step S9). The IP Centrex server 9 sends an “ACK (acknowledgment response)” message to the IP telephone terminal 22 (step S10).

  As a result, a call can be made between the IP telephone terminal 21 and the IP telephone terminal 22 (step S11). This call is performed by directly exchanging voice packets between the IP telephone terminal 21 and the IP telephone terminal 22 without using the IP Centrex server 9 by using RTP (Real-time Transport Protocol).

  When the call ends and the disconnection operation is performed at the IP telephone terminal 21, the IP telephone terminal 21 transmits a “BYE (disconnection notification)” message to the IP Centrex server 9 (step S12). The IP Centrex server 9 that has received the “BYE (disconnection notification)” message transmits a “BYE (disconnection notification)” message to the IP telephone terminal 22 (step S13).

  The IP telephone terminal 22 that has received the “BYE (disconnection notification)” message transmits a “200 OK (acknowledgement)” message to the IP Centrex server 9 (step S14). The IP Centrex server 9 that has received the “200 OK (accepted)” message transmits the “200 OK (acknowledged)” message to the IP telephone terminal 21 (step S15).

  The above operation sequence is the same as the operation sequence between general IP telephone terminals, and does not use the extension call, hold, and extension transfer functions by the IP Centrex server 9. Next, such a hold function and an extension transfer function will be described.

  In the present embodiment, depending on the contents of the setting information of the IP telephone terminals 3 to 6 functioning as extension telephones and the IP Centrex server 9, (a) the call is put on hold in response to the hold operation of the extension telephone during an outside line call In the state, when there is a connection request from the IP phone terminal on the hold side, the hold is released and the IP phone terminal and the extension telephone on the hold side are connected. (B) The call is put on hold in response to the hold operation, an extension call is made in response to the extension call operation following the hold operation, and when a connection request is received from the IP phone terminal on the hold side during the extension call, the call is put on hold with the IP phone terminal (C) Hold the call according to the hold operation of the extension telephone during an external call, perform an extension call according to the extension call operation following the hold operation, and IP phone on hold When a connection request is received from the terminal, setting to connect the IP phone terminal to the extension telephone of the call destination, (d) the call is put on hold according to the hold operation of the extension telephone during an external call, and the extension following the hold operation Forcible transfer is performed according to the transfer operation, and when a connection request is received from the IP telephone terminal on the hold side during the forced transfer, the IP telephone terminal is connected to the extension telephone of the transfer destination. Setting is possible.

  Hereinafter, each of these settings will be described in order. In the following description, for convenience, description of SIP methods (INVITE, REFER, NOTIFY, etc.) and status codes (200 OK, etc.) in each message is omitted. Further, the operation of the IP Centrex server 9 is omitted. Therefore, for example, steps S1 and S2 in FIG. 3 will be described on the assumption that the IP telephone terminal 21 has transmitted an “INVITE (call request)” message to the IP telephone terminal 22.

  FIG. 3 is a diagram showing an operation sequence in the case (a). In this figure, the first terminal 31 and the third terminal 33 are IP telephone terminals set to function as extension telephones in FIG. 1, that is, any two of the IP telephone terminals 3 to 6, The two terminals 32 are IP telephone terminals that can make external calls with them, that is, the IP telephone terminal 2. Further, the sequence of FIG. 3 (the same applies to FIGS. 4 to 6 described later) starts from a state in which the first terminal 31 and the second terminal 32 are executing the procedure S11 of FIG.

  During a call between the first terminal 31 and the second terminal 32, a hold request message is sent from the first terminal 31 to the hold managing unit 91 in accordance with the hold operation P1 at the first terminal 31 (step S21). The hold manager 91 that has received the hold request message transmits a hold determination request message to the second terminal 32 (step S22). When receiving the hold determination request message, the second terminal 32 sends a hold determination request ACK message to the hold management unit 91 to notify that the hold determination request message has been received (step S23). Upon receiving the hold determination request ACK message, the hold management unit 91 sends a hold request ACK message to the first terminal 31 to notify that the second terminal 32 has accepted the hold request (step S24), and hold notification. A message is sent to the second terminal 32 (step S25).

  Through the above procedure, the first terminal 31 and the second terminal 32 are put on hold and put on hold, respectively. At this time, the hold management unit 91 stores in the terminal state information storage unit 93 that the first terminal 31 and the second terminal 32 are on hold and on hold.

  Next, a holder connection request message is sent from the second terminal 32 to the hold management unit 91 in response to the connection request operation P2 at the second terminal 32 that is an extension telephone being held (step S26). The hold management unit 91 that has received the holder connection request message determines that the connection to the hold terminal is set by referring to the setting information stored in the setting information storage unit 92, and the terminal state information The storage unit 93 is referenced to search for a hold terminal, and the first terminal 31 is found (step S27). And according to the result, the transmission path connection notification message for the first terminal 31 is sent to the second terminal 32 (step S28).

  The second terminal 32 that has received this transmission path connection notification message connects the path to the first terminal 31 (step S29). The first terminal 31 to which the path is connected from the second terminal 32 sends a hold response request message to the hold management unit 91 (step S30). Then, the hold manager 91 sends a hold release notification message and a hold response request ACK message to the second terminal 32 and the first terminal 31 (steps S31 and S32), respectively, so that the first terminal 31 and the second terminal 32 Becomes busy. At this time, a sound is output from the speaker of the first terminal 31 that was the holding side. Therefore, even if the holder takes his / her ear off the handset, he / she can hear the voice from the user of the second terminal 32 and thus notices that the hold has been released.

  FIG. 4 is a diagram showing an operation sequence in the case (b). In this figure, the procedures (S21 to S25) until the first terminal 31 and the second terminal 32 are put on hold and put on hold are the same as in FIG.

Next, an extension call request message is sent to the hold management unit 91 in response to the extension call operation P3 at the first terminal 31 which is a pending extension telephone (step S33). Receiving the extension call request message, the hold manager 91 sends an extension call determination request message to the extension telephone (in this case, the third terminal 33) included in the extension call request message (step S34). . When receiving the extension call determination request message, the third terminal 33 sends an extension call determination request ACK message to the hold manager 91 to notify that the extension call determination request message has been accepted (step S35). Receiving the extension call determination request ACK message, the hold manager 91 sends an extension call request ACK message to the first terminal 31 to notify that the third terminal 33 has accepted the extension call request (step S36). An extension call is made to the third terminal 33 (step S37). As a result of this extension call, the third terminal 33 outputs a ringing tone for ringing. At this time, the first terminal 31, the second terminal 32, and the third terminal 33 are on hold , on hold, and on extension calls. The hold management unit 91 stores in the terminal state information storage unit 93 that the first terminal 31, the second terminal 32, and the third terminal 33 are on hold, on hold, and on an extension call.

  Next, during an extension call to the third terminal 33, a holder connection request message is sent from the second terminal 32 to the hold management unit 91 in response to a connection request operation P4 at the second terminal 32 that is a held telephone. (Procedure S38). The hold manager 91 that has received the holder connection request message determines that the connection to the first hold terminal is set by referring to the setting information stored in the setting information storage unit 92, and the terminal The first holding terminal is searched by referring to the state information storage unit 93 to find the first terminal 31 (step S39). Subsequent steps S40 to S45 are the same as steps S28 to S32 of FIG. 3 except that a step S44 for sending a transfer incoming call deletion notification message to the third terminal 33 that is receiving a transfer incoming call is added.

  Through the above procedure, the first terminal 31 and the second terminal 32 are busy, and sound is output from the speaker of the first terminal 31 that was on the holding side. Even if the extension is being called, before the response is made at the third terminal 33, the call is connected to the first terminal 31 on the holding side.

  FIG. 5 is a diagram showing an operation sequence in the case (c). In this figure, the procedure until the second terminal 32 sends the holder connection request message to the hold management unit 91 (S21 to S38) is the same as FIG.

  The hold management unit 91 that has received the holder connection request message determines that the connection to the extension call destination is set by referring to the setting information stored in the setting information storage unit 92, and the terminal state The extension call destination is searched with reference to the information storage unit 93, and the third terminal 33 is found (step S46). And according to the result, the transmission path connection notification message for the third terminal is sent to the second terminal 32 (step S47).

  The second terminal 32 that has received this transmission path connection notification message connects the path to the third terminal 33 (step S48). The third terminal 33 to which the path is connected from the second terminal 32 sends a hold response request message to the hold management unit 91 (step S49). Then, the hold management unit 91 sends a hold release notification message and a hold response request ACK message to the second terminal 32 and the third terminal 33 (steps S50 and S51), respectively, so that the second terminal 32 and the third terminal 33 Is in a call and a voice is output from the speaker of the third terminal 33 which is the extension call destination.

  FIG. 6 is a diagram showing an operation sequence in the case (d). In this figure, the procedure (S21 to S25) until the first terminal 31 is on hold and the second terminal 32 is on hold is the same as in FIG.

  Next, a hold transfer request message is sent to the hold management unit 91 in response to the forced transfer operation P5 at the first terminal 31 that is an extension telephone on hold (step S52). Here, the forced transfer is a method of transferring without waiting for the response of the transfer destination, and the forced transfer operation P5 for that purpose is, for example, an operation of inputting an extension telephone number of the transfer destination and on-hooking when the call is confirmed. is there.

The hold manager 91 that has received the hold transfer request message sends a hold transfer determination request message to the extension telephone set (here, the third terminal 33) included in the hold transfer request message (step S53). . Upon receiving the hold transfer determination request message, the third terminal 33 sends a hold transfer determination request ACK message to the hold management unit 91 to notify that the hold transfer determination request message has been accepted (step S54). The hold manager 91 that has received the hold transfer determination request ACK message sends a hold transfer request ACK message to the first terminal 31 to notify that the third terminal 33 has accepted the hold transfer request (step S55). Forcible transfer is performed to the third terminal 33 (step S56). By this forced transfer, the ringing tone for the incoming call is output at the third terminal 33. At this time, the first terminal 31, the second terminal 32, and the third terminal 33 are on standby, on hold, and on incoming transfer. The hold management unit 91 stores in the terminal state information storage unit 93 that the first terminal 31, the second terminal 32, and the third terminal 33 are waiting , held, and receiving a transfer.

  Next, during a transfer incoming call to the third terminal 33, a holder connection request message is sent from the second terminal 32 to the hold management unit 91 in response to a connection request operation P6 at the second terminal 32 which is a held telephone. (Procedure S57). The hold management unit 91 that has received the holder connection request message determines that the connection to the forced transfer destination is set by referring to the setting information stored in the setting information storage unit 92, and the terminal state The forced transfer destination is searched with reference to the information storage unit 93, and the third terminal 33 is found (step S58). The subsequent steps S59 to S63 are the same as the steps S47 to S51 in FIG.

  Although the above embodiment relates to a key telephone device using IP Centrex, the present invention can also be applied to a key telephone device in which a key telephone is accommodated in the extension of the main device.

It is a figure which shows the structure of the communication system of embodiment of this invention. It is a figure which shows an example of the procedure until it is complete | finished after a pair of IP telephone terminal in FIG. 1 starts a telephone call. FIG. 3 is a diagram showing a first example of an operation sequence when a held IP telephone terminal makes a connection request in the communication system of FIG. 1. FIG. 10 is a diagram showing a second example of an operation sequence when a held IP telephone terminal makes a connection request in the communication system of FIG. 1. FIG. 10 is a diagram showing a third example of an operation sequence when the held IP telephone terminal makes a connection request in the communication system of FIG. 1. FIG. 10 is a diagram showing a fourth example of an operation sequence when the held IP telephone terminal makes a connection request in the communication system of FIG. 1.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... IP network, 2-6 ... IP telephone terminal, 9 ... IP Centrex server, 91 ... Holding control part, 92 ... Setting information storage part, 93 ... Terminal state information storage Department.

Claims (2)

A button telephone apparatus having a plurality of key telephones, wherein the external telephone call is held in response to a hold operation of the key telephone during an external call, and an extension call is made in response to an extension call operation following the hold operation And a means for connecting the hold-side telephone and the callee button telephone when a connection request is received from the hold-side telephone during an extension call by the means. Telephone device. A key telephone system having a plurality of key telephone sets, and means for holding the external call in accordance with a hold operation of said key telephone in external call, internal line transfer destination in accordance with the extension transfer operation following the hold operation the means for performing the forced transfer, when receiving a connection request from holdee telephone during transfer by said means, to have a means for connecting the said transfer destination EKT and holdee phone A featured key telephone device.

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