JPH03165154A - Isdn incoming call detection method - Google Patents

Abstract

PURPOSE:To call an optimum extension to an incoming call from an ISDN line by setting a caller number to a caller number table and a called party extension number proper to the caller. CONSTITUTION:When an incoming comes from an ISDN line 1, incoming information is sent to an ISDN trunk control section 3 via an ISDN trunk 2 and further fed to a common control section 20. Upon the receipt of the information, the common control section 20 references a caller number table 21 to extract an extension number corresponding to the number. As an example, let a caller number be 0459321231, then the extension telephone set number is discriminated to be 2300 and the common control section 20 commands an extension control section 6 to call the extension telephone set 4. Thus, a call from a specific caller is given to an extension telephone set for a person proper to receive the call based on the caller number table.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an incoming call method in a telephone exchange connected to an ISDN.

BACKGROUND OF THE INVENTION Conventional analog public networks do not have a method for informing the called party of the calling party's number when a call is received from a central office. For this reason,
Only after answering an incoming call did they find out who was calling and then transferred the call to the designated person.

Problems to be Solved by the Invention However, when multiple people share multiple telephone extensions, such as in a company, it is possible to know who is calling before answering an incoming call, and ensure that the person who is supposed to answer is using the phone. There has always been a strong desire to ring only the extension telephone. With rSDN, which is currently in service, the calling party number is sent from the network when a call arrives, making it possible to provide services using this number. It is an object of the present invention to provide an ISDN incoming call method that makes use of the characteristics of ISDN and allows the user to know to whom the call is directed before responding.

Means for Solving the Problems In order to achieve the above object, the present invention provides a telephone table in which telephone numbers of callers who are expected to receive calls are registered in advance, and each caller number is registered in advance. By setting an extension telephone number to be called each time a call is received from ISDN, the most suitable person corresponding to the calling number is called.

Therefore, according to the present invention, the telephone to be called is determined according to the calling party number sent from the ISDN network at M times, and the most suitable person for the incoming call can be called. have an effect.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 1 is an rsDN line, 2 is an ISDN trunk, and 3 is an ISDN trunk control unit, which controls incoming and outgoing calls to the ISDN line l.

4 is extension telephone A (extension number 2300), 7 is extension telephone B (extension number 2400), 10 is internal MA telephone C (extension number 2500), t'A6゜5, 8.11 is each extension telephone 4, 7. This is an extension circuit that accommodates .10. 6,9.1
2 is an extension control unit that controls each extension circuit 5.8.11. 20 is a common control unit that controls the entire telephone exchange;
1 is a calling party number table, and 22 is a communication path device for forming a communication path between the ISDN trunk 2 and the extension telephones 4, 7, and 10.

FIG. 2 shows one embodiment of the calling party number table 21. As shown in FIG. 20. The calling party number table associates a specific calling party's telephone number with the called party's extension telephone number.

Next, the operation of the above embodiment will be explained. In the above embodiment, when there is an incoming call from the ISDN line 1, the incoming call information is sent via the ISDN trunk 2 to the SDN trunk control section 3, and further sent to the common control section 2o. When the common control unit 20 receives this information, it refers to the calling party number table 21 to check whether the number is registered on the table, and if so, it displays the extension number corresponding to the number. Take out. As an example, if the calling number is 0459321231, this number is registered in the table and it is found that the extension telephone number is 2300, so the common control unit 20 instructs the extension control unit 6 to call the extension telephone 4. . Also, the calling number is 061234
567, the table shows that the extension number is 2400, and the common control section 20 instructs the extension control section 9 to call the extension telephone 7. If the received calling number does not exist on the table, the extension number 25 corresponding to XXXXXXXX set at the bottom of the table.
Call 00. Therefore, the common control unit 20 instructs the extension control unit 12 to call the extension telephone 10.

Thus, the above embodiment has the advantage that a call from a particular caller can be routed to the telephone extension of the person who is eligible to receive the call from the caller number table. Further, according to the above embodiment, when the caller is unspecified, the setting can be made such that only a certain extension telephone is called. Furthermore, unless an extension number to be called is set for the calling party number, there is an effect that incoming calls can be rejected only to a certain calling party.

Effects of the Invention As is clear from the embodiments described above, the present invention provides an ISDN line by setting a calling party number and a called party extension number appropriate for the calling party in the calling party number table. This has the effect of being able to call the most suitable extension for incoming calls.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a telephone exchange apparatus in an embodiment of the ISDN incoming call method of the present invention, and FIG. 2 is a block diagram showing an embodiment of a calling party number table. 1...1sDN line, 2...+SDN trunk, 3
... rSDN trunk control unit, 4... Extension telephone A
15... Extension circuit, 6... Extension control unit, 7... Extension telephone 818... Extension circuit, 9... Extension control unit,
10... Extension telephone C, 11... Extension circuit, 12.
... Extension control unit, 20 - Common control unit, 21 - Calling party number table, 22 - Communication path device.

Claims (1)

[Claims] A calling party number table is provided in the telephone exchange equipment in which a destination extension number can be set in correspondence with the calling party number sent from the ISDN line, and incoming calls from the ISDN line are registered in the calling party number table. An ISDN incoming call method characterized in that when there is a called party number given, an extension telephone corresponding to the calling party number is called.