JPH011358A - hands-free telephone - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hands-free telephone, and particularly to a voice-switching hands-free telephone.

1. Prior Art" Voice-switching hands-free telephones have long been well known, and by detecting voice being transmitted and received and alternately turning on and off the microphone and speaker, the telephone can be used without having to pick up the receiver. It was designed to be able to make and receive calls.

1-Problems to be Solved] However, when the operator makes a hands-free call with a conventional voice-switching hands-free phone, it is difficult to check whether the user is in the transmitting state (microphone = ON) or the receiving state (speaker). :ON) It is not easy to judge whether it is turned on or not.

For this reason, there is a problem in that the timing of the call with the other party (caller) does not match well, resulting in the beginning of the conversation being cut off or the call being interrupted, making it difficult to make effective use of the Hashi Zufter call.

The present invention has been made in view of such conventional problems, and its purpose is to determine whether the operator is in the transmitting state or the receiving state when making a hands-free call. An object of the present invention is to provide a voice switching type hands-free telephone that can easily perform voice switching.

[Means for solving coexistence points] In order to achieve the above-mentioned object, the present invention provides an audio system that compares the level of the received voice and the transmitted voice in a voice switching type hands-free telephone installed in a central office line or a PBX line. a level comparison circuit; a transmitting/receiving connection circuit that connects the transmitting voice or the receiving voice to a communication path under the control of the audio level comparing circuit; and a display unit that displays each operation of the transmitting/receiving connecting circuit. It is configured like this.

L Embodiment] Next, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a preferred example of a hands-free telephone according to the present invention.

In the hands-free telephone of the embodiment, during a call via a central office line or PBX line, the transmitted voice input from the microphone 10 and the transmitting amplifier 20 is rectified by the transmitted voice rectifying circuit 30 and sent to the voice level comparison circuit 40. is input.

Further, the received voice input from the terminal 100 is rectified by the received voice rectifier circuit 60, and the voice level comparison circuit 40
is input.

The audio level comparison circuit 40 includes each of these rectifier circuits 30.6.
It compares the signals input from 0 and detects which of the received voice level and the transmitted voice level is higher.

When the transmitting audio level is higher than the receiving audio level, the transmitting audio connection circuit 70 connects the microphone 10 and the terminal 1.
10 and transmits the voice to the central office line or PBX line.

At the same time, the LED control circuit 80 connected to the outgoing audio connection circuit 70 and the incoming audio connection circuit 50 supplies current to the LED 90 (ON) while the outgoing audio connection circuit is operating. GN) lights up.

Further, when the received voice level is higher than the transmitted voice level, the received voice connection circuit 50 connects the speaker 130 and the terminal 100 via the receive amplifier 120, and transmits the received voice from the office line or PBX line to the speaker. 130.

At the same time, the LED control circuit 80 connected to the transmitting audio connection circuit 70 and the receiving audio connecting circuit 50 supplies current to the LED 90 (RD) while the receiving audio connecting circuit is operating, so that the red LED 90 <Light up I'(D).

According to the present invention, it is possible to confirm whether the telephone is in the transmitting state or in the receiving state by lighting the LED 90 (<RD, GN).

According to this embodiment, 11.
Although the case where an ED is used has been described as an example, the present invention is not limited to this, and it is also possible to use other display means as necessary.

1゛Effects of the Invention] As explained above, according to the present invention, when making a hands-free call using a voice switching type hands-free telephone, the transmitting/receiving status display means is used to notify the operator of the telephone. It can tell you whether the hands-free operation is in the transmitting state or in the receiving state,
This has the effect of allowing you to effectively use the hands-free calling function.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram showing a preferred embodiment of a hands-free telephone according to the present invention. 10: Microphone, 20: Transmission amplifier, 30: Transmission audio rectification circuit, 40: LR voice level ratio comparison path, 50: Reception audio connection circuit, 60: Reception audio rectification circuit, 70: Transmission audio connection circuit , 80: LED control circuit, 90: 2-color LED (GN, RD), 120: Receiving amplifier, 130: Speaker.

Claims (1)

[Scope of Claims] A voice switching hands-free telephone installed in a central office line or a PBX line, comprising: a voice level comparison circuit that compares the levels of received voice and transmitted voice; and control of the voice level comparison circuit. 1. A hands-free telephone set comprising: a transmitting/receiving connection circuit that connects a transmitting voice or a received voice to a communication path; and a display section that displays each operation of the transmitting/receiving connecting circuit.