JPS5980053A - Mutual connecting method of extension - Google Patents

Abstract

PURPOSE:To realize an interphone function, a secretary telephone function, etc., by storing a specific subscriber information of remote side for each subscriber and dialing the specific number to connect mutually the extensions. CONSTITUTION:A subscriber A delivers a call to each an originating register trunk ORT and then dials a prescribed specific number. Thus a central controller CC reads out the information on a subscriber B of remote side which is stored in a storage device MM and checks an idle state or a busy state of the subscriber B. If the subscriber B is idle, the mutual connection is carried out among extensions. Furthermore the information on the subscriber A is set previously to the subscriber B, and therefore a pair of telephone sets are constituted to show the remote side to each other. Thus in interphone function is obtained.

Description

[Detailed description of the invention] The present invention relates to a method for interconnecting extension lines in an automatic exchange.

Conventionally, extension interconnections include a method of dialing the extension number of the other party, or a method of connecting to a specific extension by simply lifting a handset without dialing, as in the case of a hotline. There are also methods such as special public telephones that have both of the above functions, but when connecting to a specific extension, you have to wait for the pre-pose timing, and conversely, when the pre-pose timing has passed, ,
It had drawbacks such as always calling the other party.

In order to eliminate the above-mentioned drawbacks, the present invention, in addition to the conventional method of connecting by dialing the other party's extension number, provides a method for connecting by dialing a specific single number. An extension interconnection method for connecting to extensions is provided.

The present invention stores specific counterpart subscriber information for each subscriber in a storage device connected to a central control unit in an automatic exchange, and searches the storage device when the subscriber dials a specific number. An extension interconnection method is obtained which is characterized in that extension interconnection is performed using the read partner information.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a relay system diagram of an exchange showing an embodiment of the extension interconnection method of the present invention. In the figure, A and B are extension subscribers, ORT is an originating register trunk, CC is a central control unit, MM is a storage device, and SW is a conversion switch.

When the subscriber station A makes a call, captures the calling register trunk ORT, and dials a predetermined specific number, the central controller CC sends a call to the subscriber station B provided in the storage unit MM.
information is read out, and the idle/busy status of the other subscriber B is checked. If it is empty, extension line interconnection is completed using a conventionally known method.

Furthermore, if subscriber A's information is set as the other party's information for subscriber B, a pair of telephones that indicate each other can be configured, and can be used like an intercom.

According to the present invention, all subscribers can call the corresponding subscriber by dialing the same specific number, and applications such as an intercom function and a secretarial telephone function are possible.

[Brief explanation of drawings]

FIG. 1 is a relay system diagram showing one embodiment of the present invention.
...Extension subscriber, ORT...Outgoing register trunk, CC...Central control unit, MM...
...Storage device, SW...Replacement switch. Agent Patent Attorney Susumu Uchihara V 1st Closing

Claims (1)

[Claims] A storage device connected to a central control unit in an automatic exchange stores specific counterpart subscriber information for each subscriber, and when the subscriber dials a specific number, the storage device is searched and read out. An extension interconnection method characterized by interconnecting extensions using subscriber information.