JPH01255350A - Digital telephone set - Google Patents

Abstract

PURPOSE:To simultaneously enable plural calls with a single telephone set by providing one set of dial buttons for calling and plural handsets to a digital telephone set to be connect-housed in an exchange with plural lines and sharing the dial buttons. CONSTITUTION:A digital telephone set 101 is housed in the exchange by two lines 102 and 103, and the digital telephone set 101 has one set of dial buttons 104 and two handsets 105 and 106. When a controller 212 receives an off-hook detection notification from an off-hook detector 205 or 206, the controller 212 controls a switching circuit 209, a path between a control signal path 210 or 211 at the side of a receiver to execute an off-hook and a dial signal sending circuit 208 is set, and a dial signal can be sent to the lines. By sharing and using one set of the dial buttons 104 in such a way, plural persons can simultaneously execute the calls with opponents to be different by using the same telephone set, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to digital telephones, and more particularly to telephones with multiple handsets.

[Conventional technology]

Conventionally, this type of digital telephone has only one built-in handset and is connected to an exchange through one line. No consideration is given to using the line to make multiple calls at the same time.

[Problem to be solved by the invention]

The conventional digital telephones mentioned above have only one built-in handset and are connected to the exchange through one line, so it is possible to use multiple handsets and lines to connect to multiple telephones. The disadvantage was that it was not possible to talk to different parties using multiple handsets.

Further, since only one call can be made with one telephone, it is necessary to install a number of telephones corresponding to the number of calls, which has the disadvantage of requiring a corresponding amount of space and cost.

An object of the present invention is to provide a digital telephone that solves the above problems.

[Means to solve the problem]

[In order to achieve the first objective, in the present invention, a digital telephone main body includes a set of dial buttons for making a call, a plurality of handsets, and a plurality of handsets connected to an exchange through a plurality of lines. The system has means for controlling which line out of a plurality of lines a dial signal is sent from when dialing is performed using a dial.

〔Example〕

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

(Example 1) FIG. 1 is an external view of Embodiment 1 of the present invention.

FIG. 2 is a block diagram of the configuration of the first embodiment of the present invention.

In FIG. 1, a digital telephone 101 has two lines (
The line 102 and line 103) are accommodated in the exchange.

In addition, the digital telephone lot has one set of dial buttons, one
04 and two handsets 105 and 106.

In FIG. 2, handset 105 connects to line interface circuit 201, handset 106 connects to line interface circuit 202, audio signal path 203 and audio signal path 2.
04, respectively.

Off-hook detection devices 1205 and 206, keypad control circuit 207, dial signal sending circuit 208, switch circuit 209, line interface circuit 201,
202 and the control device 212 are connected to an internal bus 2131.

When the off-hook detection devices 205 and 206 detect off-hook, they notify the control device 212.

When the dial button 104 is pressed, the keypad control circuit 207 notifies the control device 212 of which button was pressed. When the control device 212 receives the off-footer detection notification, it controls the switch circuit 209, sets up a bus between the control signal path 210 or 211 on the side of the handset that has gone off-hook, and the dial signal sending circuit 208, and connects the dial signal sending circuit 208 to the line. Enables dialing signal transmission.

The controller 212 disconnects the bus after dialing is completed.

Additionally, control is performed to ignore other off-hook detection notifications while dialing.

Calling Method> When the user lifts up the handset 105, the off-hook detection device 205 detects off-hook and notifies the control device 212. The control device 212 controls the switch circuit 209 and sets a bus between the dial signal sending circuit 208 and the control signal path 210.

Next, the keypad control circuit 207 detects the dial number pressed by the user and notifies the control device 212.

The control device 212 instructs the dial signal sending circuit 208 to send out a corresponding dial signal, and the dial signal sending circuit 208 sends the dial signal through the control signal path 210 and the line interface circuit 201 to the exchange, which is then connected and transmitted through the audio signal path 203. Voice input from the handset 105 can be transmitted to the other party.

Receiving method> When the digital telephone 101 notifies the handset 106 of an incoming call and the user picks up the handset 106, the off-hook detection bag @206 detects off-hook and notifies the control device 212. The control device 212 is the line interface circuit 2
02, the line interface circuit 201 connects the audio signal path 204 to the audio signal path of the other party's line, and the voice input from the handset 106 can be transmitted to the other party.

(Example 2) FIG. 3 is an outside view showing a second embodiment of the present invention.

In the above embodiment, the exclusive right to dial is given to the user of the handset by off-hook.

By providing the switch button 301 as shown in FIG. 3, the switch circuit 209 is controlled by the 1st position of the switch button 301 instead of off-hook, and the bus between the dial signal sending circuit 208 and the control signal path 210 or 211 is set. You can also take this method.

〔Effect of the invention〕

As explained above, the present invention provides a digital telephone with a plurality of handsets and receivers, and by sharing and using one set of dial buttons, multiple people can talk to different parties at the same time using the same telephone. In addition, the number of telephones required is smaller than in the past, and this has the effect of saving desk space and cost.

[Brief explanation of the drawing]

FIG. 1 is an external view showing a first embodiment of the present invention, FIG. 2 is a block diagram of the configuration of the first embodiment of the present invention, and FIG. 3 is an external view showing a second embodiment of the present invention. 101...Digital telephone 102.103...
Line 104...Dial button 105,106...
...Handsets 201, 202...Line interface circuits 203, 204...Audio signal path 205,
206...Off-hook detection device 207...Keypad control circuit 208...Dial signal sending circuit 209
... Switch circuit 210, 211 ... Control signal path 212 ... Control device 213 ... Internal bus 301 ... Switching button

Claims (1)

[Claims] (1) A digital telephone body includes a set of dial buttons for making calls, multiple handsets, and multiple lines connected to an exchange, and a dial signal is generated when dialing is performed using the dial buttons. 1. A digital telephone set, comprising: means for controlling which line out of a plurality of lines is used to transmit the information.