JPH0435115B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a subscriber calling system in a storage program controlled electronic exchange, and in particular, when there is an incoming call related to a representative number, If each subscriber is called at the same time and the incoming call is connected to the subscriber who answered the call first, and a transfer request is made by another subscriber belonging to the same representative group, The present invention relates to a subscriber paging system in which incoming calls are transferred to other subscribers.

[Background of the Invention] When subscriber telephones are housed in a storage program control type electronic exchange, when a plurality of subscriber telephones are installed in a department that performs the same business, for example, when making a call, it is necessary to For this purpose, a representative (connection) method using a representative number and a branch method in which subscriber telephones are connected in multiple ways have been adopted. Among these, in the case of the representative system, when a caller dials a subscriber telephone number that has been registered as a representative in advance, the exchange calls the subscriber corresponding to that subscriber number. If that subscriber is busy at that time, the exchange searches for an available subscriber among the other registered subscribers, and then calls the available subscriber. It is becoming more and more like this.

In the representative system described above, the caller does not particularly wish to connect with a specific subscriber; if the caller is connected to one of the subscribers registered in advance as a representative group, the caller's purpose is fulfilled. This has been fully achieved. By the way, the problem with this representative system is that each subscriber must answer the call when it is called, and if the telephone closest to the unoccupied seat is called, the telephone Having to go to the location and answer the call has become a tedious process.

Therefore, as a service to resolve the above-mentioned problems related to answering calls during absence, calls to the telephone nearest to the absent seat in the same group can be made by dialing a special number from the telephone nearest to the seat of the seat. One possibility is to adopt a pick-up service that transfers the call to a nearby phone and connects the call at the same time, but this service requires more dialing and requires a new method that requires more time to answer the call. It has become a problem.

In addition, in the branch system, the number of branches is limited to two or three at most due to the electrical characteristics of the connection of the telephone equipment itself, and there is a limit to the number of branches that can be accommodated on the subscriber line. Another problem is that because there is only one subscriber line, only one call can be made at a time. In addition, in order to exchange calls with other subscribers in the representative group after answering, a separately prepared transfer function is required, but in order to realize this transfer function, a new call path is secured. If it is necessary and cannot be secured, the transfer cannot be performed.

[Object of the Invention] The object of the present invention is that when there is an incoming call related to a representative number, each subscriber making up the representative group is called at the same time, and the call is received to the subscriber who answered the call first. If a transfer request is received from another subscriber belonging to the same representative group while the call is connected, the incoming call can be transferred to the other subscriber without requiring a new communication path. It provides a new calling method.

[Summary of the Invention] In order to achieve the above object, the present invention provides a representative number corresponding to the representative group for each of two or more subscribers who are connected to the same time-division communication channel in multiple ways and constitute a representative group. When an incoming call is received, simultaneous ringing is performed based on the subscriber number stored in advance for the representative number, and the time-sharing channel is transferred to the subscriber who answered the call first. However, if any subscriber is connected to the call and there is a transfer request from another subscriber who belongs to the same representative group as that subscriber, the call will be connected to the representative group. Connecting the subscriber currently connected to the incoming call to the call by referring to the stored subscriber identification information and connection path information about the subscriber currently connected to the incoming call. After forced restoration, the call is transferred to the subscriber who issued the transfer request based on the subscriber number obtained from the subscriber accommodation location based on the connection path information.

[Embodiments of the Invention] The present invention will be explained below with reference to FIGS. 1 to 4.

First, a method of accommodating subscriber telephones belonging to the same representative group in the storage program control type electronic exchange according to the present invention will be described. FIG. 1 shows the mode of accommodating the subscriber telephones. As shown,
Subscriber telephones (A to C) belonging to the same representative group 12
- 14 are connected and accommodated in multiple ways to the time division communication paths 10 and 11 from the time division communication path switch 4 via subscriber circuits 5 to 7 provided corresponding to these telephones 12 to 14. There is. A central processing unit 1 housed in an address/data bus 8 together with a main memory 2 controls a time division telephone switch 4 via a signal receiving and distributing device 3, while each subscriber circuit 5-7 It is designed to be monitored and controlled via a control line 9.

FIG. 2 also shows the subscriber telephone accommodation interface to the subscriber circuit. In this example, in order to simplify the drawing, only the accommodating interface of the subscriber telephone 12 to the subscriber circuit 5 is shown;
The same applies to number 4. As shown in the figure, a subscriber telephone 12 is accommodated via subscriber lines 16, 17 and a transfer control data line 18 to a subscriber circuit 5 forming a part of an exchange 15. Although the subscriber telephone 12 itself is equipped with a transfer button T, the other subscriber telephones 13 and 14 are also equipped with the transfer button T in the same way.

First, the incoming call connection when a general call is received to the subscriber telephone 12 will be explained as follows.

That is, the call processing program calls subscriber telephone 1.
When an incoming call to subscriber circuit 2 is identified, a connection path to subscriber circuit 5 is first selected. Specifically, one of the time division communication channels 10 and 11 is selected, and then a predetermined vacant time slot is selected. After this, a control command for sending a calling signal to the subscriber telephone 12 is sent from the central processing unit 1 to the control circuit in the subscriber circuit 5 via the signal reception and distribution device 3. Now, based on this control command, a calling signal is sent to the subscriber telephone 12. If the subscriber answers this call,
This response is detected by the subscriber loop in the subscriber circuit 5, and a loop display is made to the control circuit. This loop display is read by the central processing unit 1 via the signal reception and distribution device 3 by the call processing program as a subscriber response, but when there is a subscriber response to the call,
In order to establish a connection using the time-division channel and time slot that have already been selected in advance, the central processing unit 1 sends a message to the time-division channel switch 4 and the subscriber circuit 5 via the signal reception and distribution device 3. A connection control command is to be sent. Based on this connection control command, the call path selection circuit in the subscriber circuit 5 is driven, and as a result, a predetermined time slot is drawn from the selected time-division call path, and a call can be made through this time slot. This is the result. Even when a general call is received on the subscriber telephones 13 and 14, a similar connection is made so that the subscriber can make a telephone call.

The incoming call connection in the case of a general incoming call is as described above. Next, the incoming call connection in the case where the subscriber paging system according to the present invention is applied will be explained as follows.

That is, when that calling method is applied,
A representative telephone number is assigned in advance to each representative group, and the subscriber numbers forming the representative telephone number are stored in the main storage device 2. Now, in this situation, if the call processing program identifies the received telephone number as a representative telephone number, a representative group is identified from that representative telephone number, and the representative group is identified from the representative telephone number. The subscriber number of each subscriber telephone is known. Here, if the identified representative group is made up of subscriber telephones 12 to 14, then after securing the time-division channel and time slot that can be used for telephone calls, By expanding the connection control for incoming calls, among the subscriber telephones 12 to 14 that make up the representative group, those that are in an idle state (in this example, subscriber telephones 12 to 14
(assuming that all the terminals are vacant) A calling signal is sent to all terminals at the same time. Generally, one or more subscribers will respond to this simultaneous call, but among these responses,
Only the earliest one is valid. That is, the central processing unit 1 monitors the responses from each of the subscriber telephones 12 to 14, and draws in the reserved time division communication path and time slot only to the subscriber telephone that responded first. While a control command is sent from the central processing unit 1 to the subscriber circuit corresponding to the subscriber telephone in order to connect the subscriber telephone,
The representative connection is terminated by sending a control command to stop calling to the subscriber circuits corresponding to the other subscriber telephones to perform recovery processing. As a result, if, for example, the response is from the subscriber telephone 12 first, only the subscriber telephone 12 will be placed in a callable state, and even if the response operation is not performed on the subscriber telephones 13 and 14. Even so, it is ignored.

In this way, the call is connected only to the subscriber who answered first, but while that subscriber is on the line, another subscriber belonging to the same representative group makes a transfer request. The following is an explanation of the case.

That is, in the representative connection according to the present invention, the main storage device 2 stores the identification information of the subscriber who responded to the call first and the connection path information (the time-division call path used) in correspondence with the representative telephone number. A forwarding data area is provided to store the time slot identification number), but the stored contents are updated each time a call is forwarded, and the stored contents are initialized when the call ends. It's getting old. Now,
Here, assuming that a transfer request is made from the subscriber telephone 13 while the subscriber telephone 12 is in the process of making a call using the representative connection, the transfer process in this case will be explained. If the subscriber at 13 wishes to transfer, subscriber telephone 1
3, the transfer button T is pressed down. The press of the transfer button T is detected as a transfer request by the control circuit in the subscriber telephone 13, and the control circuit uses the transfer request to connect the subscriber lines 16, 17.
By forming a loop in the subscriber telephone 1
The call from the subscriber circuit 6 is made known to the subscriber circuit 6. At the same time, transfer request data is sent to the subscriber circuit 6 via the transfer control data line 18, so that the control circuit within the subscriber circuit 6 displays a call/transfer request. On the other hand, the call processing program constantly monitors the outgoing call indication on each subscriber circuit, and normally, when a outgoing call indication is identified, a dial tone is sent to the subscriber's telephone related to the outgoing call. However, in the transfer according to the present invention, when the calling display is identified, the transfer request display is checked.

When the calling display is identified by the call processing program, as shown in FIG. )LPN
By being indexed by the subscriber telephone 12~
The representative phone number list MHLNo. related to 14 is now required. Thereafter, by indexing the transfer data table BSYLPN shown in FIG. 4 by its representative telephone number list MHLNo., the specified data is stored in the transfer data area corresponding to the representative telephone number list MHLNo. It is now something that is checked to see if it is. The transfer data area stores the busy LPN (in this example, the subscriber circuit number LPN of subscriber circuit 5), the destination LPN, and the communication path (connection path) information between them. Call transfer control can be performed based on the location information of the subscriber circuit 6. The call processing program first drives the call path selection circuit in the subscriber circuit 5 to release the time slot during a call. After that, if the subscriber circuit 5 sends a control command to the subscriber circuit 6 to draw in the time division communication path and time slot that have been used up until then, the call will be routed through the subscriber circuit 6 to the subscriber telephone. 13. During this transfer process, the contents stored in the transfer data area are updated as post-processing, and the busy tone connection to the subscriber circuit 5 is performed, thereby completing the series of transfer processes. If there is a subsequent transfer request from either subscriber telephone 12 or 14, that transfer request will be processed in the same manner as in the above case, thereby allowing retransfer. Therefore, if retransfer is repeated, multiple calls are possible.

[Effect of the invention] As explained above, according to the present invention,
When an incoming call related to a representative number is received, each subscriber making up the representative group is called at the same time, and the incoming call is connected to the subscriber who answered the call first. When a transfer request is received from another subscriber belonging to the group, an effect can be obtained in that the incoming call is reliably transferred to the other subscriber without requiring a new communication path.

[Brief explanation of drawings]

FIG. 1 is a diagram showing how each subscriber telephone belonging to the same representative group is accommodated in the storage program control type electronic exchange according to the present invention, and FIG. 2 is a diagram showing the accommodation state of subscriber telephones in the subscriber circuit. The diagrams illustrating Ace, FIGS. 3 and 4 are diagrams for explaining the transfer process when a transfer request is received from another subscriber in the same representative group. 1...Central processing unit, 2...Main storage device, 3...
...Signal reception distribution device, 4...Time division channel switch, 5-7...Subscriber circuit, 8...Address/data bus, 9...Control line, 10, 11...Time division channel, 12, 14...Subscriber telephone, 16,1
7...Subscriber line, 18...Transfer control data line.

Claims (1)

[Claims] 1. When there is an incoming call related to the representative number corresponding to the representative group to each of two or more subscribers who are connected to the same time-sharing communication channel in multiple ways and make up a representative group, Subscription in a storage program control type electronic switching system, in which simultaneous calls are made based on pre-stored subscriber numbers, and the call is connected to the subscriber who answers the call first via the time-division communication path. In the subscriber paging system, when one of the subscribers composing the representative group is connected to an incoming call, a transfer request based on a special call is received from another subscriber belonging to the same representative group as the subscriber. In this case, it is stored corresponding to the representative group,
After forcibly restoring the connection of the subscriber currently connected to the incoming call with the call by referring to the subscriber identification information and connection path information about the subscriber currently connected to the incoming call; . A subscriber calling system in which the call is transferred to the subscriber who issued the transfer request based on the subscriber number obtained from the subscriber accommodation location based on the connection path information.