JPH01265631A - Wire broadcasting system - Google Patents

Abstract

PURPOSE:To attain broadcasting without adding any special device to a telephone exchange by connecting a broadcast input trunk and a subscriber circuit in multiple and giving a broadcast sound to a channel switch and the subscriber circuit. CONSTITUTION:In the case of applying speakers 2a-2c, channels 12a-12c of a channel switch 4 are connected by the control of a central processing unit 11. The broadcast tone flows through a path of broadcast input terminal 6 - broadcast input trunk 5 - channel 12a - subscriber circuit 3a - speaker 2a, terminal 6 - trunk 5 - channel 12b - subscriber circuit 3c - speaker 2c to attain broadcast to the speakers 2a-2c. In the case of applying broadcast to the speakers 2a, 2b, the channels 12a, 12b of the switch 4 have only to be connected by the control of the device 11. In this case, no broadcast sound flows to the speaker 2c.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a telephone switch for broadcasting in Japan, which performs broadcasting and telephone calls.

[Conventional technology]

Conventionally, an 11-talk switching system for cable broadcasting generally includes telephones 13a, 13b, and an x-peaker 14a, as shown in FIG.

14b, switching circuits 15a, 15b, subscriber circuit 16a,
16b.

It consisted of a communication path switch 17, a broadcast control device 18, and a broadcast input terminal 20. For phone calls, switch circuit 1
The contacts 22a and 22b of 5a and 15b are switched, and the broadcast is performed using the subscriber circuit 16a, ISb, and the communication path switch 17.

This was realized by closing 21b.

[Problem to be solved by the invention]

The above-mentioned conventional technology requires switching circuits 15a and 15b for each line, and when performing group broadcasting, there is a problem that control of contacts 21a and 21b of broadcast control device 1B becomes complicated. Therefore, an object of the present invention is to simplify the configuration of the equipment and provide an inexpensive telephone exchange.

[Means to solve the problem]

The purpose of the future is to provide 1
Dual connection between two broadcast input trunks and subscriber circuits,
This can be coupled by passing broadcast sound through a single channel switch and a subscriber circuit, which were conventionally used only for telephone calls.

[Effect]

The communication path switch allows the connection to be changed freely under software control. Thereby, the telephone exchange
To eliminate the need for special equipment for broadcasting including broadcasting by group.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In the figure, 1a, 1b, and IC are telephones, and 2a, 2b.

2C is a speaker, 3a, 5b, 5c are subscriber circuits,
Reference numeral 4 indicates a communication path switch, 5 a trunk for broadcast input, and 6 a broadcast input terminal.One subscriber circuit 3a is composed of a telephone control circuit 7a and a communication path interface 8a, and is a circuit used for telephone conversations. It is. The communication path switch 4 is controlled by the central processing unit 11, and the communication path switch 4 connects subscriber circuits 5a, 5b, and S to telephone calls.
Connect between C and make a call.

The broadcast input trunk 5 includes a communication path switch interface 9 and a level corrector 10, and outputs broadcast sound input from the broadcast input terminal 6 to the communication path switch 4.

When broadcasting to the speakers 2a, 2b, and 2c, the central processing unit 11 controls the communication path switch 40 and the communication path 12a.
, 12b, 12c are connected. In addition to this, the broadcast sound is
Broadcast input terminal 6 - broadcast input trunk 5 - communication path 12a
-Subscriber circuit 3a-Speaker 2a, broadcast input terminal 6-Broadcast input trunk 5-Speech path 12b-Subscriber circuit 3b-
Speaker 2b, broadcast input terminal 6 - broadcast input trunk 5
- Speech path 12c - Subscriber circuit 3cm Speaker 2c and speaker 2a.

2b and 2c respectively. Also, speaker 2
a, 2b When performing K broadcasting, the communication paths 12a and 12b of the communication path switch 4 may be connected under the control of the central processing unit 11. At this time, the broadcast sound does not flow to the speaker 2c.

According to this embodiment, there is an effect that broadcasting can be realized by simply changing the connection of the communication path switch without adding any special equipment to the telephone exchange.

[Effects of the Invention] - According to the present invention, broadcast sound can be transmitted without installing any special equipment in the telephone exchange, so it is effective in providing an inexpensive telephone exchange for wired broadcasting.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the wired broadcast system according to the present invention, and FIG. 2 is a block diagram showing the structure of a conventional cable broadcast system. 1a, 1b, 1c...Telephone 2a, 2b, 2
C...Song speakers 5a, 3b, 5c...Subscriber circuit 4...Communication path switch 5...Broadcast input trunk 6...Broadcast input terminals 7a, 7b ,
7 (:...Telephone control circuit 5a, 8b, 8c
, 9... Phase channel interface 10... Music level corrector 11... Music central processing unit $ 12a, 12b, 12
c...-Call path 13a, 13b...Song phone@1
4a, 14b...Speaker 15a, 15
b... Phase switching circuit 16a, 16b... Subscriber circuit 17... Song call #3 person switch 18...
-Broadcast control device 19...Amplifier 2o...Broadcast input terminals 21a, 21b, 22a, 22b--Interface points 25a, 25b...-Switching, circuit side control section Fig. 1

Claims (1)

[Claims] 1. A wire broadcasting system characterized in that a telephone exchange having at least one trunk for broadcast input is provided, and broadcasting is performed by making multiple connections between the trunk for broadcast input and subscriber circuits in the communication path of the telephone exchange.