JPH04104650A - Wired broadcast telephone system - Google Patents

Abstract

PURPOSE:To allow a user to hear a broadcast program and to attain talking during broadcast by providing a changeover means selecting a broadcast of a 1st line into a broadcast of a 2nd line to the system when a broadcast output is detected from an independent line adaptor. CONSTITUTION:The above system is provided with a changeover means 13 outputting a relevant broadcast when an independent line adaptor 2 detects a pushbutton signal from a telephone set 11 via an independent line speaker section 5. The independent line speaker section 5 outputs a broadcast from a 1st line 3 normally and connects a 2nd B line 4 to a telephone set and when the independent line speaker section 5 detects the presence of a broadcast output from the independent line adaptor 2 to the line 4, a changeover means 14 selects the broadcast of the line 3 into the broadcast of the line 4. Thus, the usual broadcast, that is, the emergency public broadcast is listened to even during talking and a desired broadcast is head in other cases.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wired radio telephone system.

[Conventional technology]

A conventional wire broadcast telephone system has a configuration in which a wire broadcast telephone speaker is connected to a wire broadcast telephone exchange through a pair of lines, and telephones are also branch-connected.

[Problem to be solved by the invention]

The conventional wire broadcast telephone system described above has a configuration in which the wire broadcast telephone speaker is connected to the wire broadcast telephone exchange through a pair of lines, and the telephone is also branch-connected, so that the broadcast cannot be heard during a call. The disadvantage is that you cannot listen to the broadcast, and you cannot make calls during the broadcast. Particularly when there is an emergency situation during a broadcast, it is a problem if a call cannot be made, and there is also a disadvantage that subscribers can only listen to one type of broadcast from the headquarters.

[Means to solve the problem]

The wired broadcasting telephone system of the present invention is provided with an independent line speaker section including a broadcasting speaker on the subscriber side, an independent line adapter in the wired broadcasting telephone exchange, and wherein the independent line adapter and the independent line speaker section are connected to each other. is connected by two lines, a first line and a second line, and a telephone is connected to the independent line speaker section, and the independent line adapter connects the telephone to the second line via the telephone and the independent line speaker section. a first switching means for switching to output a type of broadcast corresponding to the push button signal to the second line when a push button signal from the telephone is detected; The broadcast from the first line is output, the second line is connected to the telephone, and when it is detected that there is a broadcast output from the independent line adapter to the second line, the broadcast from the first line is output. and a second switching means for switching from the broadcasting line to the second line broadcasting.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, in this embodiment, A line 3 and B line are connected from an independent line adapter 2 built in a cable broadcast telephone exchange 1
Connect line 4 to independent line speaker unit 5 on the subscriber side,
One line of various broadcast output lines 7 from a broadcast sound source 6 at the headquarters is outputted to the A line 3 via a power amplifier 8, and connected to a plurality of independent speaker sections 5 using a multi-circuit 9. ing.

The independent line speaker unit 5 normally connects the A line 3 of the output of the power amplifier 8 to the external speaker 10 through the switching circuit 15, connects the B line 4 to the telephone 11, and allows broadcasting and telephone calls to function independently. A polarity reversal detection circuit 14 that detects the polarity reversal of the line 4, an amplifier 16 that amplifies the signal of the B line 4, an external speaker 10, and a switching circuit 1 that switches according to the reversal detection signal of the polarity reversal detection circuit 14.
5.

The independent line adapter 2 connects to the telephone 11 via the B line 4.
a detector 12 for detecting a Bush signal from the detector 1;
The switching circuit 13 connects the B line 4 to one of the various broadcast output lines 7 from the broadcast sound source 6 according to the two detection signals.

Next, the operation of this embodiment will be explained.

When a subscriber of the telephone 11 wants to listen to a desired broadcast during free time, he sends a buzz signal by pressing the dial on the telephone 11, which is detected by the detector 12 built into the independent line adapter 2 and corresponds to the content of the buzz signal. The various broadcast output lines 7 are connected by a switching circuit 13 and output to the B line 4. At the same time, the independent line adapter 2 reverses the polarity of the B line 4. The independent line speaker unit 5 detects the polarity reversal of the B line 4 by the polarity reversal detection circuit 14, and the switching circuit 1
5 to the B line 4 side, and the broadcast output from the B line 4 is outputted to the external speaker 10 via the amplifier 16.

Incidentally, while an emergency broadcast is being output to the A line 3, the independent line adapter 2 is configured not to accept a bush signal.

Furthermore, normally the independent line speaker section 5 is equipped with a power amplifier 8.
The output of the A line 3 is connected to an external speaker 10 by a switching circuit 15, so that calls by the telephone 11 connected to the B line 4 and broadcasting by the external speaker 10 function independently.

〔Effect of the invention〕

As explained above, the present invention provides an independent line speaker unit including broadcasting speakers on the subscriber side, an independent line adapter in the cable broadcast telephone exchange, and connects the independent line adapter and the independent line speaker unit to the subscriber side. Connect with two lines, the first line and the second line, and then connect the telephone to the independent line speaker section, and the independent line adapter connects the telephone and the second line via the independent line speaker section to receive push signals from the telephone. The independent line speaker unit normally outputs the broadcast from the first line, and includes a first switching means that switches to output the type of broadcast corresponding to the push button signal to the second line when a button signal is detected. , a second switching means is provided which connects the second B line to the telephone and switches from the first line broadcast to the second line broadcast when detecting that there is a broadcast output from the independent line adapter to the second line. This allows regular broadcasts, i.e. emergency public broadcasts, to be heard even during a call, and at other times, and when the subscriber is not on a call, the subscriber receives a push-button signal. If requested, we can provide a system that allows subscribers to listen to their desired broadcasts, which has the effect of enriching services for subscribers more than ever before.

Line speaker section, 6...Broadcast sound source, 7...Various broadcast output lines, 8...Power amplifier, 9...Multi-circuit, 10...External speaker, 11...Telephone, 12.
...Detector, 13.15...Switching circuit, 14...Polarity reversal detection circuit, 16...Amplifier.

Claims (1)

[Claims] An independent line speaker unit including a speaker for broadcasting is provided on the subscriber side, an independent line adapter is provided in the cable broadcast telephone exchange, and the independent line adapter and the independent line speaker unit are connected to a first line and a second line. Connect with two lines,
Further, a telephone is connected to the independent line speaker section, and the independent line adapter is connected to the telephone via the second line via the independent line speaker section, and when a push button signal from the telephone is detected, the push button signal is output. a first switching means for switching to output a type of broadcast corresponding to the second line to the second line; the independent line speaker section normally outputs the broadcast from the first line; is connected to the telephone set, and includes second switching means that switches from broadcasting on the first line to broadcasting on the second line when detecting that there is a broadcasting output on the second line from the independent line adapter. A wired broadcast telephone system characterized by: