JPS60116262A - Telephone set - Google Patents

Abstract

PURPOSE:To transmit a fixed transmission level to a trunk line or a PBX line even if a caller speaks intentionally in a small voice by changing the amplification rate of an amplifier circuit connected to a handset through the changeover of a switch. CONSTITUTION:When a caller inputs a voice to a handset 101, an output of the amplifier 103 is fed to the trunk line or the PBX line 109 via a talking circuit 107. When a changeover switch 106 is closed in this case, the amplification factor of the amplifier circuit 103 is nearly the unity and when the switch 106 is opened by depressing it, the amplification factor is nearly 10 times. Thus, if the caller desires talking in a small voice, the switch 106 is opened so as to increase the amplification rate of the amplifier circuit 103. Even if the caller speaks intentionally in a small voice in this way, a fixed transmission level is transmitted through the trunk line or the PBX line.

Description

[Detailed description of the invention] The invention relates to a telephone set, and in particular, it is possible to transmit a call to a central office line or PBX line at the same volume as normal voice even if the caller intentionally speaks in a low voice when transmitting a call. Compatible with telephones.

Traditionally, telephones have had the disadvantage that when a caller sends a call, if the caller intentionally speaks in a low voice, the level of the transmitted voice decreases, and the receiving level of the other party's phone also decreases, making it difficult for the other party to hear the call. .

An object of the present invention is to connect an amplifier circuit to a transmitter and increase the amplification factor by changing a switch, so that even if the caller intentionally speaks in a low voice, the transmitting level can be adjusted to one line or one line. PBX
The object of the present invention is to provide a telephone that can send out calls to the Internet.

According to the invention, a telephone connected to a central office line or a PBX line for making calls includes a transmitter that converts the operator's voice into an electrical signal and sends it out, and a telephone that outputs the voice from the transmitter manually. It includes an amplifier circuit that can vary the amplification factor for amplification, and an amplification changeover switch that changes the amplification factor of the amplifier circuit when necessary, and sends normal voice or amplified transmitted voice to the office line and PBX-ray. A telephone set characterized by this can be obtained.

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

The figure is a circuit diagram showing an embodiment according to the present invention.

The non-embodiment includes a transmitter 101, an amplifier circuit 103 having high input impedance and a high amplification factor, and a transmitter 101.
A resistor 102 (=1.
5K (1), 104 (=15Ω), 105 (=1.
5 to Ω), the switch 106 and the transmission signal to the 1st office line (or low connected to PBX) 109 and the office line 109
The communication circuit 107 includes a communication circuit 107 having normal anecdotal functions such as sending a reception signal inputted from the telephone receiver 108 to the telephone receiver 108.

When the caller inputs voice to the transmitter 101.

The amplification factor of the audio output from the amplifier circuit 103 is approximately 1 times (0 dH) when the changeover switch 106 is closed, and is approximately 10 times (20 dB) when the switch is pressed, and the amplification factor is approximately 10 times (20 dB) when the switch is pressed. 107 and is transmitted through the communication circuit 107 to the station boat or PHIJ 109.

For example, if the caller wishes to speak in a low voice, switch 10
6 is opened, and the voice output is increased by about 10 times (20 dB) determined by the resistance ratio of resistors 102 and 104, and the voice is transmitted to the central office line or PBX line via the telephone communication circuit 107. When the operator intentionally speaks in a low voice as described above, by pressing the changeover switch 106, the voice level output to the central office line or PBX-ray 109 can be sent to the same level as the normal voice level.

As explained above, the invention is such that even when the operator of the telephone is in a conference call or is intentionally speaking in a low voice to prevent eavesdropping by others, the amplifier can be activated by pressing the selector switch. This has the effect of transmitting an audio level equivalent to that of the audio.

[Brief explanation of drawings]

The figure is a circuit diagram showing an embodiment of the invention. 101...Telephone, 107...Telephone circuit, 102...Resistor, 108...Telephone receiver,
103...Amplifier, 104...Resistor,
105... Resistor, 106... Changeover switch.

Claims (1)

[Claims] In a telephone connected to a central office line or PBXfg for making a call, a transmitter that converts the voice of a caller into an electrical signal and sends it out, and a variable amplification factor amplifier circuit that amplifies the V voice signal from the transmitter, are necessary. 1. An amplification changeover switch that changes the amplification factor of the amplification circuit only when the above-mentioned conditions are met.