JPH06177988A - switch - Google Patents

Abstract

(57) [Summary] [Purpose] Even when several transfers are required to transfer to the other party's terminal to be called, the user of the same extension communication terminal can intervene and transfer. Provide an exchange that can lighten the burden of terminal operation. [Structure] A first call received from an external line is held by an extension communication terminal 3 connected to an exchange 1, and an extension communication terminal 4 connected from the extension communication terminal 3 to an exchange 1 receives a call associated with the first call. The second call is set, and the call between the extension communication terminal 3 and the extension communication terminal 4 is established. Then, when the extension communication terminal 5 calls the extension communication terminal 5 connected to the exchange 1, and the extension communication terminal 5 responds when receiving this call, the extension communication terminal 5 holds the first call. The second call set to No. 4 is released, the third call related to the first call is set from the extension communication terminal 3 to the extension communication terminal 5, and the call between the extension communication terminal 3 and the extension communication terminal 5 is set. Establish.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange.

[0002]

2. Description of the Related Art According to a conventional exchange, if the transfer destination is set in advance to an extension communication terminal such as automatic transfer when busy, automatic transfer when response is delayed, automatic transfer when absent, etc. It is possible to transfer from an extension communication terminal called as to another extension communication terminal, but if the user of the extension communication terminal called as the third party once responds, the second extension communication terminal ( If you allow the transfer from a call in the same manner as the extension communication terminal that received the call first and allow the transfer in multiple stages, there are multiple transfers between the calling communication terminal and the transfer destination extension communication terminal. Since this extension communication terminal exists, it causes confusion for users of this extension communication terminal.
There is a problem that it is difficult to provide the transfer service to the user of the extension communication terminal called as the first person.

In order to solve this problem, the user of the second extension communication terminal leaves the conversation and enters the two-party call state between the originating communication terminal and the extension communication terminal called as the third party. It is necessary to change the user of the extension communication terminal (transfer agent) to perform the transfer, or the user of the extension communication terminal called as the third party exits the conversation and the calling communication terminal and the second party There has been a problem that the user of the second extension communication terminal has to perform the transfer again after the two-party call of the extension communication terminal of the eye is set to the state of two-party call.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems in the above-mentioned conventional exchange, and even when it is necessary to transfer several times to transfer to the terminal of the called party. It is an object of the present invention to provide an exchange in which users of the same extension communication terminal can intervene and reduce the burden of terminal operation at the time of transfer.

[0005]

[Means for Solving the Problem] A first device connected to an exchange.
Means for holding a first call received from an external line to another extension communication terminal, and a second call associated with the first call to a second extension communication terminal connected to the exchange from the first extension communication terminal. Means for establishing a call to establish a call between the first extension communication terminal and the second extension communication terminal, and calling the third extension communication terminal connected to the exchange from the second extension communication terminal. Means and, upon receiving the call, the third
When the extension communication terminal responds, the second call set in the second extension communication terminal is released while the first call is held, and the first extension communication terminal releases the third call from the third extension communication terminal. It is characterized by further comprising means for setting a third call related to the first call to the extension communication terminal and establishing a call between the first extension communication terminal and the third extension communication terminal.

[0006]

In the exchange of the present invention, the first call received from the outside line is held by the first extension communication terminal connected to the exchange, and the second call connected from the first extension communication terminal to the exchange is held. Second extension associated with the first call to the extension communication terminal of
And a call is established between the first extension communication terminal and the second extension communication terminal. Then, when the third extension communication terminal connected to the exchange is called from the second extension communication terminal and the third extension communication terminal responds when the call is received, the first call The second call set to the second extension communication terminal is released in the state of holding the call, and the third extension communication terminal receives the third call related to the first call from the first extension communication terminal. A call is set up and a call is established between the first extension communication terminal and the third extension communication terminal.

[0007]

1 is a block diagram of an embodiment of the exchange of the present invention.

In FIG. 1, 1 is an exchange, 2 is an outgoing communication terminal, 3 is an incoming (transfer source) extension communication terminal, and 4 is (first).
Transfer destination extension communication terminal, 5 is a (second) transfer destination extension communication terminal, 6 is a (third) transfer destination extension communication terminal, (first)
The transfer destination extension communication terminal 4 is an incoming (transfer source) extension communication terminal 3
From the extension communication terminal which is called as the third party first, and the (second) transfer destination extension communication terminal 5 is the extension communication terminal which is connected as the third party by the transfer from the (first) transfer destination extension communication terminal 4. The (third) transfer destination extension communication terminal 6 means an extension communication terminal connected as a third party by the transfer from the (second) transfer destination extension communication terminal 5.

Next, an embodiment of the exchange of the present invention will be described with reference to FIGS.

For convenience of description, the description of FIGS. 2 to 5 will be given later.

The following will show how the state of the extension communication terminal in a call is changed by the transfer from the extension communication terminal called as the third party in the exchange 1.

First, the communication terminal 2 as a caller makes a call to the extension communication terminal 3 as a transfer source, receives an incoming call from the extension communication terminal 3 as a transfer source and responds, and then the extension communication terminal 3 and the extension communication terminal 2
And are in a call.

Next, the extension communication terminal 3 of the transfer source is (first)
When the extension communication terminal 3 makes a third-party call from the busy state in order to perform the transfer to the extension communication terminal 4 of the transfer destination, the communication terminal 2 of the transmission source is put on hold and the extension communication terminal 3 of the transfer source is called. The extension communication terminal 4 of the (first) transfer destination is in a call. After that, when the transfer operation shown in FIG. 2 is performed by the extension transfer terminal 4 as the first transfer destination and the extension communication terminal 5 as the (second) transfer destination is designated as the transfer destination, the processing shown in FIG. As shown in FIG. 4, the extension communication terminals 3, 4,
5, a signal is exchanged between the exchange 5 and the exchange 1, and the extension communication terminal 5 of the (second) transfer destination is called as shown in FIG.
The (first) transfer destination extension communication terminal 4 is released, and the (second) transfer destination extension communication terminal 5 responds, and the transfer source extension communication terminal 3 and the (second) transfer destination extension communication terminal 5 are in a call. Then, the state becomes the same as when the extension communication terminal 3 of the transfer source calls the extension communication terminal 5 of the (second) transfer destination by calling a third party while the call is in progress. Similarly, the transfer to the (third) transfer destination extension communication terminal 6 and thereafter is also possible. In this way, by the transfer communication of the extension communication terminal 3, if the intended extension communication terminal of the transmission communication terminal 2 is the (second) transfer destination extension communication terminal 5, the transmission source communication terminal 2 is held. The call is released between the originating communication terminal 2 and the extension communication terminal 5. Similarly, if the intended extension communication terminal of the originating communication terminal 2 is the extension communication terminal 6 of the (third) transfer destination, the hold of the originating communication terminal 2 is released and the originating communication terminal 2 and the extension A call is made with the communication terminal 6.

FIG. 2 is a flow chart of a terminal operation in the exchange 1 at the time of transfer from the extension communication terminal called as the third party.

As shown in FIG. 2, after the transfer source extension communication terminal 3 and the (first) transfer destination extension communication terminal 4 become busy (step 101), the (first) transfer destination extension communication terminal 4 Hooking is performed (step 102), and if the entry tone is heard at the extension communication terminal 4 (step 103), the telephone number of the second extension extension communication terminal 5 is dialed as the transfer destination (step 104). As a result, when the extension communication terminal 4 of the first transfer destination hears the success tone (step 105), the extension communication terminal 4 of the first transfer destination
Then, the off-hook is performed (step 106), and the transfer processing between the extension communication terminal 4 as the first transfer destination and the extension communication terminal 5 as the second transfer destination ends (step 107).

FIG. 3 is a flow chart regarding the service contents at the time of transfer from the extension communication terminal 4 called as the third party in the exchange 1.

As shown in FIG. 3, when the extension communication terminal 3 of the transfer source that first receives an incoming call and the extension communication terminal 4 of the (first) transfer destination that is called as the third party are busy (step 201), when the extension communication terminal 4 presses the transfer key (step 203), the extension communication terminal 3 hears the hold tone. Here, if the extension communication terminal 4 hears the entry tone (step 204), the telephone number of the extension transfer terminal 5 which is the second transfer destination is dialed as the transfer destination (step 2).
05). As a result, the extension communication terminal 3 listens to the ringback tone (step 207). When the extension communication terminal 4 hears the success tone (sound of successful translation of the telephone number) (step 208), the extension communication terminal 5 is called (step 206), and at the same time, the extension communication terminal 4 of the first transfer destination is called. Is released (step 208). When the extension communication terminal 5 responds to the call in step 206 (step 209), the extension communication terminal 3 of the transfer source and the extension communication terminal 5 of the second transfer destination are in a call.

FIG. 4 shows a signal sequence between the extension communication terminal and the exchange 1 at the time of transfer from the extension communication terminal called as the third party in the exchange 1.

The transfer source extension communication terminal 3 which first receives an incoming call
During a call with the extension communication terminal 4 that is called as the third party (first) as the transfer destination (step 301), a transfer request is sent from the extension communication terminal 4 to the exchange 1 (step 30).
2). In response to this, the switch 1 sends a hold notice to the extension communication terminal 3 (step 303). As a result, the extension communication terminal 3 is put on hold.

When the extension communication terminal 4 dials the telephone number of the transfer destination extension communication terminal 5, the telephone number is sent to the exchange 1 (step 304). As a result, the exchange 1 switches the extension communication terminal 3 from holding to calling (step 305), and a disconnection signal is sent from the exchange 1 to the extension communication terminal 4 (step 306). And
A call is made from the exchange 1 to the extension communication terminal 5 (step 307). Upon receiving this call, the extension communication terminal 5
Is answered (step 308), a call is made between the extension communication terminal 3 and the extension communication terminal 5 (step 309).

FIG. 5 is a flowchart of the processing of the exchange when the transfer is executed from the extension communication terminal 4 called as the third party.

Now, the extension communication terminal 3 and the extension communication terminal 4 are in a call (step 401). The hooking for the transfer request is received from the extension communication terminal 4 (step 40).
2). As a result, the hold tone is transmitted to the extension communication terminal 3 which is currently in the call (step 403). Next, the exchange 1 translates the telephone number of the transfer destination extension communication terminal 5 dialed by the extension communication terminal 4 (step 404). If the translation fails here, an unsuccessful sound is transmitted (step 411), and it is judged whether or not a certain time has passed since the beginning of listening to the unsuccessful sound, or whether there is hooking (step 412), and whether there is hooking, or If a certain time has passed, the call is returned to the initial state.

If the translation is successful in step 404, it is judged whether the extension communication terminal requesting the transfer is the second party (in this case, the (transfer source) extension communication terminal 3) or the third party (step 405). If it is the second person, the third person (here (first)
Call the transfer destination extension communication terminal 4) (step 4)
14). If it is the third party in step 405, the extension communication terminal of the transfer destination is called (step 406). Here, the extension communication terminal 5 of the transfer destination dialed earlier is called. Then, the current extension communication terminal 4 of the third party is released (step 407). Then, the extension communication terminal 3 of the second party is switched from the holding state to the calling state (step 408). And
(Second) It is judged whether or not the transfer destination extension communication terminal 5 is off-hook (step 409), and if it is off-hook, the transfer destination extension communication terminal 5 is set as a new third party extension communication terminal. 3 is connected (step 410).

In FIG. 1, the source communication terminal 1 does not have to be directly connected to the exchange 1, but may be connected to the exchange 1 via a public network or a dedicated network.

[0025]

As described above, according to the exchange of the present invention, the extension communication that first receives an incoming call even if several transfers are required to transfer to the terminal of the other party to be called. Each time the agent of the terminal can act as an agent,
Therefore, it is possible to reduce the load of terminal operation on a plurality of extension communication terminals when performing transfer.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an exchange of the present invention.

FIG. 2 is a flowchart of a terminal operation at the time of transfer from an extension communication terminal called as a third party according to FIG.

FIG. 3 is a flowchart regarding service contents at the time of transfer from an extension communication terminal called as a third party according to FIG.

FIG. 4 is a diagram showing a signal sequence between the extension communication terminal and the exchange when transferring from the extension communication terminal called as the third party according to FIG. 1;

FIG. 5 is a flowchart of processing of an exchange when transfer is carried out from the extension communication terminal 4 called as the third party according to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 exchange 2 outgoing communication terminal 3 incoming (transfer source) communication terminal 4 (first) transfer destination communication terminal 5 (second) transfer destination communication terminal 6 (third) transfer destination communication terminal

Claims (1)

[Claims] 1. A means for holding a first call received from an external line to a first extension communication terminal connected to an exchange, and a second extension communication connected to the exchange from the first extension communication terminal. Means for setting a second call related to the first call in the terminal and establishing a call between the first extension communication terminal and the second extension communication terminal; and a switch from the second extension communication terminal Means for calling a third extension communication terminal connected to the second extension communication terminal; and, when the third extension communication terminal responds to the call when the call is received, the second call is put on hold with the first call.
Releasing the second call set to the extension communication terminal, and setting the third call related to the first call from the first extension communication terminal to the third extension communication terminal. An exchange comprising: an extension communication terminal and means for establishing a call between the third extension communication terminal.