JPS6338391A - Key telephone device - Google Patents

Abstract

PURPOSE:To substantially prevent transmission of PB signals produced by operations of keys and therefore giving no unpleasantness to the remote side, by setting a PB signal attenuating circuit into a channel to attenuate the PB signals when keys are pushed. CONSTITUTION:When a holding state is desired for a circuit kept busy with a key telephone set 2, an optional key, e.g., a # key is pushed in a busy mode. Thus a PB signal generating circuit 12 delivers a PB signal corresponding to said key. This PB signal is received by a PB signal receiving circuit 7 and sent to a controller 9. Thus the controller 9 knows that the set 2 is operated for holding and therefore the controller 9 bolds the relevant circuit. Here a PB signal attenuating circuit 4 is put in series with a channel and therefore the PB signals produced with push of the # key are scarcely transmitted to the remote side.

Description

[Detailed description of the invention] Industrial applications! 1. Field of the Invention The present invention relates to a "button loading" device that can put a button telephone on hold even if it does not have a special hold button.

BACKGROUND TECHNOLOGY As a single device, a pushbutton telephone that can put one line on hold even if it is a pushbutton telephone that does not generally believe in a special hold button.
There is a known system in which the telephone switch is turned off for a predetermined period of time during a call so that the exchange detects this and puts the line on hold.

Problems to be Solved by the Invention However, in this type of button telephone device, the period during which the footer switch is turned off to put the line on hold is from 0.2 seconds to 1.
．． It is predefined as 2 seconds, and if it is less than that, it will not be detected.
If it's longer than that, the call will be deemed to have ended and the line will be disconnected, making the hold operation itself extremely difficult.

The present invention eliminates the following drawbacks of the conventional technology, and aims to provide an excellent button telephone device that has a simple configuration and can easily perform a hold operation on an ordinary key telephone. It is something.

Means to Solve the Problems In order to achieve the above object, the present invention detects the press operation of any key provided on the button telephone during communication and makes the security function 1 island. A control device is installed in the exchange and configured to put the line on hold. A PB signal attenuation circuit is provided to monitor the IT transmission.

Therefore, according to the present invention, f1↓1 person 1. In addition, according to the present invention, there is no limit to L'+ in the pressing operation time of the key, and the holding operation can be easily performed. Because we have a ``reducing circuit'', there is no possibility that the PB that occurs when you hold the hold operation is transmitted to the other party at all, and even against hands (11 times, it is unpleasant). , has the effect of not being possible.

Is the example diagram a button of the present invention? 1i, in FIG. 13, which is a schematic configuration diagram of an embodiment of the communication device, 1 is an exchange machine, 2 is a button telephone, 3←1 is an exchange Ja, a communication path terminal provided in 1, and 4 is an exchange. 1 is a PB signal attenuation circuit provided in the communication path, 5 is an analog switch connected in parallel to the PB signal attenuation circuit 4, 6 is a communication lance, and 7 is a communication line 1.
- PB signal receiving circuit provided on the primary side of the lance 6, 8
9 is the output of the PB signal receiving circuit 7, and the 7-trick detection circuit 8 is connected to the secondary side of the communication lance 6.
A control device consisting of a microcomputer, etc., which inputs the output of the switch 1 and controls the exchange 1; 10 is a 7-phone switch making up the button telephone 2; 11 is a communication circuit equipped with a handset, etc.; 12 is a 10 key, a # key, Rice key etc. (III
This is a PB signal generation circuit for the dial.

In the above embodiment, when holding the handset and turning on the hook switch 10, the hook switch 1 is transferred from the battery E.
0. Call circuit 11.7 A predetermined current flows through the hook detection circuit 8, the hook detection circuit 8 detects it, and transmits it to the control device 9. When the control device 9 receives the signal from the configuration circuit 8, it turns on the analog switch 5 and substantially short-circuits the PB borrowing attenuation circuit 4. Therefore, in this state, the user operates the 10 key on the BOKUN'IE handset 2, and the PB signal generating circuit 12 generates a PB call to the other party's telephone number, thereby calling the other party. When the other party answers the call, the control device iT 9 (not shown) detects this, turns off the analog switch 5, and inserts the PB signal attenuation circuit 4 substantially in series in the communication path.

If you want to put the line in the i-term on hold on machine 2, press any key during the call, such as #.
Press the key] ~ 1 I 1 4, Press the # key 4AA Negative, the PB signal generation circuit 12 generates the PB corresponding to that key
Since fA'j is outputted, received by the PB signal receiving circuit 7, and transmitted to the control device 9, the control device 9 detects that the key telephone 2 has been put on hold. Based on this detection, the control device 9 (not shown) puts the line on hold. In this case, since the PB signal attenuation circuit 4 is inserted in line with the communication path, the PB signal obtained by pressing the # key is hardly transmitted to the old one.

Effects of the Invention As is clear from the above-mentioned embodiments, the present invention is constructed so that the call can be put on hold simply by pressing the convex key provided on the button telephone during a call. Since there is no restriction on the time for the pressing operation, it has the advantage that the operation is very simple and accurate operation can be expected. The present invention has the advantage that even if a key is operated during a call and the PB double signal is generated by the key operation, the signal is hardly transmitted to the other party and does not cause any discomfort to the 4-1 hand.

BRIEF DESCRIPTION OF THE DRAWINGS The figure is a schematic configuration diagram of an embodiment of the button telephone device of the present invention. 1... Switchboard, 2... Key telephone,
3... Communication path terminal, 4... PB signal attenuation circuit, 5... Analog switch, 6...
...Telephone transformer, 7...PB signal receiving circuit, 8...Footer detection circuit, 9...Control device, 10...Hook switch, 11・・・・・・
...Telephone circuit, 12...PB signal generation circuit.

Claims (1)

[Claims] A control device is provided in the exchange to which the button telephone is connected, which detects when any key on the button telephone is pressed during a call and puts the line on hold, and the controller is installed in the telephone line of the exchange. A button telephone device is provided with a PB signal attenuation circuit that attenuates a PB signal generated when a key is pressed, and is configured to prevent the PB signal from being transmitted to the other party during a call by the attenuation circuit.