JPS59148495A - Connecting system between private branch of exchange and branching type exclusive line - Google Patents

Abstract

PURPOSE:To attain individual selection by connecting a private branch of exchange with extension circuits having the same number of slave stations so as to connect branching type exclusive lines to an optical private branch of exchange. CONSTITUTION:In calling a slave station 7a of a branching type exclusive line 6 from an extension telephone set 4a, an extension number assigned to a slave station 7a is dialed at first from the extension telephone set 4a. The private branch of exchange 1 receives this number by an outgoing register 8 and transmits a calling signal to the corresponding extension circut 5a. A branching circuit adaptor 3 to which the extension circuit 5a is connected makes calling to the slave station 7a corresponding to the extension circuit 5a receiving this calling signal and displays the incoming call by the slave station 7a. When the branch line adaptor 3 detects the response at the slave station 7a, the branch line adaptor 3 closes the extension circuit 5a. The private branch of exchange 1 connects the extension telephone sets 4a and 5a through an extension trunk 2 as the response of the slave station depending on the closing of the extension circuit 5a and the communication is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a system for connecting a branch private line to a private branch exchange.

[Description of prior art]

BACKGROUND ART Conventionally, there have been many methods in which a dedicated line is connected to a private branch exchange, and a slave station on the dedicated line is individually selected from an extension telephone to make a call, and several methods have been put into practical use. However, when using a branch dedicated line, it is necessary to use a separate trunk exchange or a special trunk circuit that can translate connection control signals, making the equipment expensive. There was a drawback that it could not be used in small-scale private branch exchanges.

[Purpose of the invention]

The present invention solves the above-mentioned drawbacks, and by connecting the private branch exchange with the same number of extension circuits as the number of slave stations, it is possible to connect branch dedicated lines to any private branch exchange and make individual selections. The purpose is to provide an inexpensive configuration method.

[Key points of the invention]

The present invention is characterized in that, in a method of connecting a branch dedicated line to a private branch exchange, the selection of a slave station is performed by an internal 1'rA number by allocating the same number of extension circuits as the number of slave stations.

[Explanation based on examples]

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

The figure is a connection configuration diagram of an embodiment of the present invention. A single-stage connected crossbar type private branch exchange 1 includes an extension trunk 2,
A branch dedicated line 6 to which three slave stations 7 are connected is connected by a branch line adapter 3.

This is the three extension circuits 5a, 5'b, 5 of the private branch exchange 1.
connected by c. 8 is a transmission register.

Here, the branch adapter 3 has three extension circuits 5a, 5b,
This device has an extremely simple circuit configuration and is configured to send a calling signal to any of the slave stations 7a, 7b, and 7c branch-connected to the branch line 6 in response to a call arriving at the branch line 6.

The operation will be explained by taking as an example the case where the extension telephone 4a does not call the slave station 7a of the branch dedicated line 6.Finally, the extension number assigned to the slave station 7a is dialed from the extension telephone 4a. The private branch exchange 1 receives this number through the calling register 8 and sends a paging signal to the corresponding extension circuit 5a. The branch line adapter 3 to which the extension circuit 5a is connected calls the slave station 7a corresponding to the extension circuit 5a that received this calling signal, and the slave station 7a displays an incoming call. When the branch line adapter 3 detects that the slave station 7a has responded, the branch line adapter 3 closes the extension circuit 5a. By closing the extension circuit 5a, the private branch exchange 1, in response to the slave station, connects the extension telephone 4a and the extension circuit 5a through the extension trunk 2, thereby enabling a telephone conversation. Similarly, the extension circuit 5b corresponds to the slave station 7b, and the extension circuit 5c corresponds to the slave station 7c.

In this manner, the system of the present invention does not require a special trunk or the like in the private branch exchange as in the past in order to connect to the extension circuit, and any private branch exchange can be used, and the numbering plan is easy.

[Explanation of effects]

As explained above, the present invention provides a one-to-one correspondence between the extension circuits of the private branch exchange and the slave stations, thereby eliminating the need for modification of the private branch exchange for connecting dedicated lines, and making the equipment and installation inexpensive and economical. A method with good performance can be obtained. This results in
Branch dedicated lines can be easily connected to small-scale private branch exchanges.

[Brief explanation of drawings]

The diagram shows the connection Vt configuration of an embodiment of the present invention. circuit, 6.
...Branch dedicated line, 7...Slave station, 8...Outgoing register. Patent applicant: ihon Electric Co., Ltd. Representative Patent attorney: Naotaka Ide ■ ° [ ■

Claims (1)

[Claims] In a system for connecting a branch dedicated line to a CI+ private branch exchange, ``=the number of slave stations connected to the branch private branch line'' - 1 extension circuit is allocated, and ``2 slave stations are assigned. A connection method between a private branch exchange and a branch dedicated line, characterized in that the selection is made by the extension number of the private branch exchange.