JPH03174895A - Incoming call control system - Google Patents

Abstract

PURPOSE:To attain quick reply to a caller by transferring a call to other predetermined extension terminal equipment when an extension terminal equipment designated by incoming subaddress information is disabled of reply because of being in talking or in communication. CONSTITUTION:A telephone exchange system consists of a private branch of exchange 1, an external line 2 being a digital line, and extension telephone sets 3-5, and the private branch of exchange 1 consists of a central control section 6, a memory 7, a speech line 8, an external interface circuit 9, extension interface circuits 10-12. When an external line call including extension terminal designation information exists and a designated extension terminal equipment is in talking or in communication, the other extension terminal equipment programmed is to be connected. Thus, the quick reply to the caller is attained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an incoming call control method, for example,
This field relates to an incoming call control method for incoming calls connected to a digital line as an outside line in a private branch exchange system and containing unspecified information on the extension end.

[Prior Art] In recent years, the digitalization of telephone networks has been promoted, and the so-called l5DN network (Integrated Service
sDigital Network) service 1
When making a call, there is the transmission of called party subaddress information that specifies the extension terminal of the other party. If the called party is a private branch exchange, etc., it decodes the called subaddress information, calls the corresponding extension terminal, and when the extension terminal answers, connects a communication path between the receiving external line and the Yauchi line. is under control.

[Problem to be Solved by the Invention] However, in the above conventional example, when the called party is a private branch exchange, when the extension terminal specified by the called subaddress information is busy or communicating, the caller cannot receive a prompt response. was lacking.

The present invention eliminates such drawbacks, and when the extension terminal specified by the called subaddress information is busy or in communication and cannot respond, the voice response device promptly responds to the caller. That is the issue.

[Means and effects for solving the problem] This problem is an incoming call control method for a private branch exchange system that accommodates a digital line as an outside line, and in which when an incoming outside line call containing information that does not specify an extension end is detected, the internal line end is not specified. a decoding means for decoding the specified information; a search means for searching for the status of the specified extension terminal;
This is achieved by an incoming call control method characterized by comprising a transfer means for transferring the call to another extension terminal according to the search result of the search means.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Description of Configuration (Fig. 1)> Fig. 1 is a schematic configuration diagram of a telephone exchange system showing an embodiment of the present invention. This telephone exchange system is comprised of a private branch exchange (or main device of a key telephone device) 1, an outside line 2 which is a digital line, and extension telephones 3-5. The private branch exchange 1 includes a central control unit 6, a memory 7 to which the central control unit 6 writes and reads data, a communication path 8 that forms a communication path according to instructions from the central control unit 6, an external line interface circuit 9, and an extension telephone, respectively. 3.4.5 is connected to the extension interface circuit 10.11.12.

The outside line interface circuit 9 separates the voice signal and the control signal from the signals received from the outside line 2, and has the function of transmitting the voice signal to the communication path 8 and the control signal to the central control unit 6, respectively, and the function of transmitting the voice signal to the communication path 8 and the control signal to the central control unit 6, respectively. It has a function of multiplexing audio signals or control signals from the central control unit 6 and transmitting the multiplexed signals to the outside line 2.

<Explanation of Control Procedure (FIG. 2)> Next, the control procedure at the time of incoming call executed by the above-mentioned central control unit 6 will be described below with reference to the flowchart shown in FIG. Note that the control procedure (program) described later is stored in a ROM included in the central control unit 6.

First, in step 5lot, when there is an incoming call from the outside line 2, the outside line interface circuit 9 detects the incoming call, separates the control signal included in the incoming call information, and notifies the central control unit 6 of the control signal. In response to this signal, the central control unit 6 advances the process to step 5102, and checks from the input control information whether called subaddress information specifying an extension terminal has been set. As a result, if it is not set, other processing is executed, but if it is set, step 5103
The process proceeds to decipher the contents of the destination subaddress information.

In the next step 5104, the state of the extension telephone is retrieved from the decoded information.

In this process, for example, if the called subaddress information is a value specifying the extension telephone 3, the extension status table in the memory 7 is read out. Alternatively, it is a process of searching the state of the extension telephone 3 by checking the hook detection circuit (not shown) of the extension interface circuit 10.

When the above search process is completed, step 5105
The process then proceeds to determine the status of the searched extension telephone 3. As a result, if the call is not in progress (if the call is idle), the process proceeds to step 5106, and an incoming ringing instruction is output to the extension interface circuit 10. In response to this instruction, the extension interface circuit 10 outputs a calling signal to the extension telephone 3, and then, when it detects a response due to the extension telephone 3 going off-hook, etc., it notifies the central control unit 6 of the response. In response to this response, the central control unit 6 performs step 5IO.
The process advances from step 7 to step 5108, and the communication path 8 between the outside line interface circuit 9 and the extension line interface circuit 10 is connected as shown by the broken line 13.

On the other hand, in step 5105, if the extension telephone 3 is busy, the process advances to step 5109, and the predetermined state of the extension telephone 5 is determined in step 5104.
Search in the same way as . When the search is completed, the result is determined in step Sl 10, and if the call is in progress, other processing is executed, but if the call is idle, the process proceeds to step 5ill, and as in step 5106, the extension Make the telephone 5 ring. Thereafter, when a response due to off-hook of the extension telephone 5 is detected, the process advances from the response waiting state in step 5112 to step 5113, and the outside line interface circuit 9 and the extension line interface circuit 12 are connected to each other.
The communication path 8 is connected as shown by the broken line 14.

In step St 10 described above, the extension telephone 5
If the telephone number is also busy, if an extension telephone that can answer the call is specified (for example, extension telephone number 4), the probability that the call cannot be answered becomes extremely low.

According to this embodiment, when there is an incoming call specifying the extension telephone 3, even if the extension telephone 3 is busy, a predetermined extension telephone 5 is used to respond, so that the incoming call can be dealt with promptly. It becomes possible.

In addition, when calling the extension telephone 5, it is possible to make the call ring with a different sound than a normal call, or to display on the display that it is a substitute call, so that the caller does not feel uncomfortable. This makes it possible to respond accordingly.

FIG. 3 is an external view showing an example of an extension terminal having a function of monitoring the status of each extension terminal and a function of quickly transferring information to each extension terminal.

In the figure, 20 is the main body of the telephone, 21 is a handset for making calls, 22.23 is an outside line monitor lamp, 24.2
5 is an outside line button, and 26 to 33 are extension monitor lamps. Further, 34 to 41 are extension transfer buttons. The extension monitor lamps 26 to 33 correspond to each extension telephone, and are turned on when the corresponding extension telephone is in use, and turned off when the corresponding extension telephone is in an idle state.

Further, extension transfer buttons 34 to 41 correspond to each extension telephone. For example, when the extension monitor lamp 26 is off, pressing the extension transfer button 34 calls the corresponding extension telephone. Thereafter, when the extension telephone answers, the communication path 8 is connected and the handset 21 is used to establish a conversation with the extension telephone.

Here, when the handset 21 is turned on-hook, the communication path between the outside line 2 that was previously being called and the extension telephone corresponding to the extension transfer button 34 is connected, and the transfer is completed.

If you use such a telephone, for example, if extension telephone 3 is busy and 1. When extension telephone 5 answers instead,
Since the extension telephone 5 is the telephone shown in FIG. 3, incoming calls from two outside lines can be quickly transferred to the extension telephone 3 when the extension telephone 3 becomes vacant immediately.

[Effects of the Invention] As explained above, when an incoming external call containing undesignated extension information is received and the designated extension terminal is busy or unable to respond, the call is sent to another programmed extension terminal. Since the connection can be made, it is possible to quickly respond to the caller.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing a control procedure in the embodiment, and FIG. 3 is an external plan view of an extension telephone in the embodiment. In the figure, 1... private branch exchange, 2... outside line, 3.4.
5... Extension telephone, 6... Central control unit, 26-33... Each extension status monitor lamp, 34-41... Transfer button to each extension. Patent applicant Canon Co., Ltd.

Claims (1)

[Claims] This is an incoming call control method for a private branch exchange system that accommodates digital lines as external lines, which includes a decoding means for decoding the unspecified extension information when an incoming external call includes undesignated extension information, and a decoding means for decoding the undesignated extension information, and An incoming call control system comprising: a search means for searching a state; and a transfer means for transferring a call to another extension terminal according to the search result of the search means.