JPH04121135U - Transceiver device with press talk function - Google Patents

Abstract

(57) [Summary] [Purpose] No independent line is provided for detecting the state of a push button. [Structure] When making a call or receiving a call, the press button 4 attached to the line on the receiver R side is pressed, and the relay A of the press switching circuit 3-1 in the call line unit 2 detects that the press button 4 is pressed, and the relay A of the press switching circuit 3-1 opens the contact a, open.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a transmitter/receiver with a press talk function, especially for mobile exchange systems on expressways. The present invention relates to a transmitting/receiving device with a press talk function used in a stem.

0002

[Conventional technology]

Conventionally, this type of handset/receiver with a press talk function has a push button as shown in Fig. 2. When the call voice is transmitted by pressing the button 14, the press inside the call line unit 12 is pressed. The switching circuit 12 receives a signal indicating that the push button 14 is pressed on a separate line, and switches the handset 11 to the It is configured to use a 6-core line, including the audio section line system of the above.

0003

[Problem that the idea aims to solve]

In the above-mentioned conventional handset device with a press talk function, the inside of the handset Since the line configuration of The disadvantage is that it requires a 6-core cord between the in-unit and handset. .

0004

[Means to solve the problem]

The handset device with press talk function of this invention is connected between two wires on the handset side. It has a button, and when transmitting the voice of a call, press the button to hear the voice of the other party. Equipped with a call switching means that allows you to talk without pressing the button when listening to the voice. It is growing.

[0005]

【Example】

Next, the present invention will be explained with reference to the drawings.

[0006] FIG. 1 is a block diagram showing one embodiment of the present invention.

[0007] In FIG. 1, the handset and receiver with the press talk function of this embodiment are connected to a handset and a handset. , a telephone line unit 2, and the handset 1 has a transmitter T and a receiver R. and a push button 4 connected between the two lines to the handset R, and the call line unit 2 has a An audio amplifier 3 connected to the transmitter T, and a pre-amplifier connected between the audio amplifier 3 and the receiver R. The press switching circuit 3-11 has a press switching circuit 3-1 that opens contact a by pressing the push button 4. It includes a relay A which opens and closes the line to the handset R.

[0008] Next, the operation of this embodiment will be explained.

[0009] When the user of the telephone with the press talk function of this embodiment outputs the voice of a call, When button 4 is pressed, relay A in press switching circuit 3-1 operates, and contact a turns on. The state will be as follows. To listen to the caller's voice on the receiver R, press push button 4. Therefore, contact a remains closed and the voice of the other party is heard on the receiver R. can be done.

0010

[Effect of the idea]

As explained above, this invention uses a common line between the handset and the push button. , the cord between the handset and the call line unit can be reduced to 4 cores, reducing costs. There is an effect that can be done.

[Brief explanation of drawings]

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

FIG. 2 is a block diagram showing an example of a conventional handset device with a press-talk function.

[Explanation of symbols]

1,11 Handset 2,12 Call line unit 3,13 Audio amplification section 4,14 Push button 3-1, 13-1 Press switching circuit T-phone R Handset A relay a contact

Claims (1)

[Scope of utility model registration request] Claim 1: The receiver has a button connected between two lines on the receiver side, and the button is pressed down when transmitting the voice of the call,
A transmitting/receiving device with a press-talk function, characterized in that the transmitting/receiving device is equipped with a call switching means for receiving the call without pressing the button when listening to the call voice from the other party.