JP2576630B2 - Key telephone equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a key telephone device.

[Conventional technology]

Conventionally, this type of key telephone device can make a telephone call (hereinafter referred to as a hands-free telephone call) using a hands-free function using a speaker and a microphone without using the key telephone handset for extension calls Met. In a key telephone device having such a function, in order to prevent howling, the speaker and microphone of the key telephone are connected to a voice switch. Was attenuating.

[Problems to be solved by the invention]

In the above-described conventional key telephone device, when making a hands-free call, unless the other party is told that he or she is making a hands-free call, the other party does not know that the call is a hands-free call, There is a problem in that the contents that should not be heard are spoken and the surroundings are heard.

Also, during a call, if one of the hands starts talking while the other is talking on a hands-free call, both voice switches pass the call to each and attenuate the reception (hereinafter referred to as the talk state). ), And both parties cannot communicate at all.

SUMMARY OF THE INVENTION An object of the present invention is to provide a key telephone apparatus capable of making an extension call by a comfortable hands-free call.

[Means for solving the problem]

The key telephone device of the present invention is a voice switch for preventing howling connected to a microphone and a speaker, a hands-free circuit connected to the voice switch, and controlling the hands-free circuit in response to operation of the hands-free switch,
A key telephone apparatus having a key telephone with hands-free means for realizing a hands-free function, wherein the key telephone has a hands-free function when the hands-free function is used by the hands-free means. Hands-free notifying means for notifying that the function is being used; voice switch notifying means for notifying the other party's key telephone of the state of the voice switch of the own key telephone; hands-free notifying means and voice of the other party's key telephone Display means for receiving information from the switch notification means and displaying the content on a display device.

〔Example〕

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

FIG. 1 is a diagram corresponding to the claims of one embodiment of the present invention.
The key telephone apparatus of the embodiment has at least two
Key telephone 1 and main unit 10 connected to office line 11
It is composed of The key telephone 1 includes a data transmission / reception circuit 2 for transmitting / receiving control data to / from a main unit 10, a microphone 6 for inputting audio, and a speaker 7 for outputting audio.
And a voice switch 9 connected to the microphone 6 and the speaker 7 to compare transmission / reception levels to prevent howling and to attenuate the lower one through the higher one, and to connect the voice switch 9 and the main unit 10 for conversion. Hands-free circuit 5 composed of a device, an amplifier and the like, a hands-free switch 8 for operating the hands-free circuit 5, a display device 4 capable of displaying characters and the like, and a control unit for controlling these units and circuits. And 3.

The control unit 3 includes a hands-free unit 31 that operates the hands-free circuit 5 by operating the hands-free switch 8;
Hands-free notifying means 32 for notifying the other party's key telephone 1 of the fact that a hands-free call is being made via the data transmission / reception circuit 2 and the main unit 10, and a voice transmission through the voice switch 9 in the transmission state or reception. Voice switch notifying means 33 for detecting whether the signal is attenuated (hereinafter referred to as a receiving state) and notifying the key telephone 1 of the other party via the data transmitting / receiving circuit 2 and the main unit 10; Hands-free control means for receiving a signal from the voice switch notifying means (not shown) and indicating the transmission state, and forcibly switching the voice switch 9 to the reception state when the voice switch 9 is also in the transmission state. 34, a display for receiving signals from the hands-free notifying means (not shown) and the voice switch notifying means of the key telephone 1 of the other party, and displaying the contents on the display device 4. Means 35.

FIG. 2 is a block diagram in which the control unit 3 of the embodiment is configured using a microcomputer. The control unit 3 includes a ROM 3a for storing a control program and the like, a RAM 3b for temporarily storing data and the like, and a CPU 3c for performing various controls by these.

Next, the operation will be described with reference to FIG. 1 and FIG. To make a hands-free call, the hands-free switch 8 of the key telephone 1 is operated. Thus, the CPU 3c operates the hands-free circuit 5 to enable hands-free communication. At this time, the CPU 3c detects the state of the voice switch 9 and
A signal indicating that a hands-free call is in progress and a signal indicating the state of the voice switch 9 are transmitted by the data transmission / reception circuit 2 to the key telephone 1 of the other party via the main device 10. At this time, at the same time, the use status of the hands-free function of the key telephone 1 and the state of the voice switch are received via the data transmission / reception circuit 2. The other party's key telephone is in a hands-free call and is in a transmitting state, and its own key telephone 1
When the voice switch 9 is in the transmitting state, the CPU 3c forcibly switches the voice switch 9 to the receiving state. Further, the received use state of the hands-free function of the key telephone 1 and the state of the voice switch are displayed on the display 4 in characters or numbers.

〔The invention's effect〕

As described above, according to the present invention, in an extension call using a hands-free call, the use status of the hands-free function of the call partner and the state of the voice switch during the hands-free call are visually displayed and used. At the same time, it is possible to enable a comfortable hands-free telephone call by controlling the hands-free call and the hands-free call so that they do not enter the transmission state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram corresponding to claims of the present invention, and FIG. 2 is a block diagram of FIG. 1 ... key telephone, 2 ... data transmission / reception circuit, 3 ...
Control unit, 3a ROM, 3b RAM, 3c CPU, 4 Display device, 5 Hands-free circuit, 6 Microphone, 7
... Speaker, 8 ... Hands-free switch, 9 ... Sound switch, 10 ... Main device, 11 ... Office line, 31 ... Hands-free means, 32 ... Hands-free notification means, 33 ... Sound switch notification means , 34 ... Hands-free control means, 35 ...
... Display means.

Claims (2)

(57) [Claims] An audio switch for preventing howling connected to a microphone and a speaker, a hands-free circuit connected to the audio switch, and a hands-free function which controls the hands-free circuit in response to operation of a hands-free switch. A key telephone device having a key telephone with hands-free means for realizing the above, wherein when the hands-free function is used by the hands-free means in the key telephone, use of the hands-free function in the key telephone of the other party is performed. Hands-free notifying means for notifying inside, voice switch notifying means for notifying the other party's key telephone of the state of the voice switch of its own key telephone, hands-free notifying means and voice switch notifying means of the other party's key telephone Means for receiving information from a computer and displaying the content on a display device And a key telephone device. 2. The key switch forcibly switches the voice switch of its own key telephone to the receiving state when the transmitting state of the voice switch is detected by the information from the voice switch notifying means of the other key telephone. 2. The key telephone apparatus according to claim 1, further comprising control means for switching.