JPH02279093A - Key telephone system - Google Patents

Abstract

PURPOSE:To hold an extension telephone set of a key telephone set or to release the state with a signal from a line wire side by using a holding signal and a holding release signal from the line wire so as to control a holding sound source circuit section and a speech switch section. CONSTITUTION:When a holding/hold release signal detection section 2 detects a holding signal, the section 2 sends a signal to a control section 3. The control section 3 sends a signal controlling a holding sound source circuit section 4 and a channel switch section 5. The holding sound source circuit section 4 sends a holding tone to an extension telephone set 40 via a channel switch section 5 and a telephone set interface section 6 switched with the signal from the control section 3 to bring the telephone set to the holding state. Thus, the extension telephone set in busy state of the key telephone set is brought into the holding state from the telephone set at the line wire side. In order to release the holding state, the holding release signal is sent from the telephone set at the line wire side and the control section 3 controls the holding sound source circuit section 4 and the channel switch section 5 to release the holding.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a key telephone device accommodating a plurality of outside lines and extension lines, and particularly to its hold function.

[Conventional technology]

Conventional key telephone devices are capable of placing or canceling a call on an external line on hold only by a signal from the extension telephone of the key telephone device.

[Problem to be solved by the invention]

The conventional button telephone device described above only has the function of placing or canceling the hold state on the outside line using signals from the extension phone of the button telephone device when making a call to an outside line. If there is no hold function,
The drawback is that calls cannot be placed on hold from the telephone on the outside line.

An object of the present invention is to place an extension telephone of a button telephone device on hold from an outside telephone that does not have a hold function,
Another object of the present invention is to provide a button telephone device that can be released.

[Means to solve the problem]

The present invention provides a pushbutton telephone device that accommodates a plurality of outside lines and extension telephones and has a hold sound source circuit section that generates a hold tone, and a call path switch section, in which a call is made between the outside line and the extension telephone. a signal detection unit that detects a signal or a hold release signal; and a control unit that receives the signal from the signal detection unit and controls the hold sound source circuit unit and the call path switch unit, and puts the extension telephone on hold from an outside line. It is also characterized by being able to release the pending state.

〔Example〕

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

FIG. 1 is a block diagram of one embodiment of the present invention. The main device 10 of the key telephone device of this embodiment includes an outside line interface section 1, a hold/hold release signal detection section 2 provided in the outside line interface section 1, a control section 3, a hold sound source circuit section 4, and , a communication path switch section 5, and a telephone interface section 6.

The outside line interface unit 1 is connected to a horse exchange or private branch exchange 30 via a plurality of outside lines 20. On the other hand, the telephone interface section 6 is connected to a plurality of extension telephones 140.

The hold/hold release signal detection unit 2 detects the MF coming from the outside line 20.
Detects the hold signal and hold release signal of the double signal.

The control unit 3 sends out signals for controlling the hold sound source circuit unit 4 and the communication path switch unit 5 based on the signal from the hold/hold release signal detection unit 2 .

The hold sound source circuit section 4 sends the hold sound to the extension telephone 40 via the call path switch section 5 and the telephone interface section 6 based on the signal from the control section 3 .

The call path switch section 5 disconnects connections between internal and external lines, etc.

Next, the operation of this embodiment will be explained.

When a telephone on the outside line (not shown) and one of the extension telephones 40 of the button telephone device are talking, if the outside line wants to put the extension telephone on hold, the telephone on the outside line sends a hold signal with an MF multiplier signal. do. This hold signal is transmitted via the horse exchange or private exchange machine 30° outside line 20 to the earthen Y110
The signal is sent to the hold/hold release signal detection unit 2 of.

When the hold/hold release signal detection unit 2 detects the hold signal, it sends a signal to the II'S unit 3. Upon receiving the signal, the control section 3 controls the hold sound source circuit section 4 and the communication path switch section 5.
sends a signal to control the

The hold sound source circuit section 4 generates a hold tone when receiving the signal from the control section 3, and the call path switch section 5 and the telephone interface section 6 switched by the signal from the control section 3.
A hold tone is sent to the extension telephone 40 via , and the telephone is placed on hold.

In this way, you can receive a button call from the telephone on the outside line.

It is possible to put a busy extension telephone on hold.

To release the hold state, the telephone on the outside line sends a hold release signal. The hold/hold release signal detection unit 2 of the main device lO of the button telephone device detects the hold release signal,
A signal is sent to the control section 3. The control unit 3 includes a hold sound source circuit unit 4
and controls the call path switch section 5 to release the hold.

〔Effect of the invention〕

As explained above, the present invention includes a hold/hold release signal detection section for detecting a hold signal and a hold release signal from an outside line in a button telephone device, and a hold/hold release signal detection section that detects a hold signal and a hold release signal from an outside line. By providing a control section that sends a signal to control the switch section, when a call is made between an outside line and the extension telephone of the button telephone device, the extension telephone of the button telephone device can be put on hold by a signal from the outside line side, or, It has the effect of removing that state.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. 1... External line interface section 2... Hold/hold release signal detection section 3... Control section 4... Hold sound source circuit section 5... Call path interface section 6...Telephone interface section 10...Main device 20...Outside line 30...Horse exchange or private branch exchange 40...Extension telephone

Claims (1)

[Claims] (1) In a button telephone device that accommodates a plurality of outside line and extension telephones and has a hold sound source circuit section that generates a hold tone, and a call path switch section, when a call is made between the outside line and the extension telephone, a hold signal from the outside line is sent. or a signal detection unit that detects a hold release signal; and a control unit that receives the signal from the signal detection unit and controls the hold sound source circuit unit and the call path switch unit, and places the extension telephone on hold from an outside line. What is claimed is: 1. A button telephone device that is capable of canceling a hold state.