JPS61245786A - Key telephone set - Google Patents

Abstract

PURPOSE:To connect a designated key telephone set by an incoming dial signal among plural key telephone sets to a private line having an incoming call by detecting the incoming call and the incoming dial signal from the private line. CONSTITUTION:When an incoming call comes to the private line L1, an incoming and a dial detection circuit 21 detects the incoming call and generates an incoming call data representing to which private line the incoming call comes and detects the incoming dial signal and generates a dial number data respectively to an incoming and dial discrimination circuit 50. When the incoming and dial discrimination circuit 50 discriminates the received data and it is informed to a control circuit 52 as the incoming data, the control circuit 52 controls a channel switch section 3 to connect the private line L1 to a corresponding talking set 341. Succeedingly, the incoming and dial discrimination circuit 50 receives the number data of the incoming dial to discriminate the corresponding key telephone set. The control circuit 52 changes over a changeover switch 201 of a private line interface 2 and uses a private line acquisition circuit 221 to form a DC loop.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a button telephone device, and particularly to a button telephone device having a main device connected to a leased line and a plurality of key telephones serving as terminals of the main device. Relating to telephone devices.

[Conventional technology]

Conventionally, with this type of button telephone device, when a call is received from a leased line, the main device cannot specify a specific one of the plurality of button telephones.

[Purpose of the invention]

The present invention eliminates such drawbacks and provides a button telephone device that detects an incoming dial signal from a dedicated line and connects the incoming call to a key telephone designated by the incoming dial signal. The purpose is to

[Structure of the invention]

The present invention provides a button telephone, a telephone interface unit that accommodates connection lines of the button telephone, a leased line interface that accommodates a plurality of leased lines, a call path switch unit that connects the button telephone and the leased lines, and the above-mentioned. a telephone interface section; the leased line interface section;
As a means for solving the above-mentioned problem, the key telephone device includes a control section that controls the communication path switch section, and the dedicated line interface section detects an incoming call and an incoming dial signal from the dedicated line. and means for sending an incoming call and dialing detection signal to the control section, and the control section sends an incoming call and an incoming dialing signal to the leased line based on the incoming call and dialing detection signal from the leased line interface section. and means to control the connection thereof.

〔Example〕

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

The drawing is a block diagram showing an embodiment of the invention.

In the figure, the main device 1 of the button telephone device includes a leased line interface section 2, a call path switch section 3, a telephone interface section 4, and a control section 5. -Ln, and this dedicated line is selectively connected to rmJ key telephones 7□ to 7m.In this embodiment, an incoming call dial is determined for each key telephone.

The leased lines Ll, . . . , Lm are connected to the communication path switch section 3 via the leased line interface section 2.

Button telephone 71. ~e7m are connected to the telephone interface section 4, the speech line of the button telephone is connected to the speech path switch section 3 via the voice interface 40, and the data line is connected to the control circuit section 5 via the data interface 41, respectively.

Communication path switch section 3. The leased line interface section 2 and the telephone interface section 4 are coupled so as to be controlled by a control section 5 including a control circuit 52 having a microprocessor.

The control section 5 includes an incoming call/dial determination circuit 50, a data transmission/reception circuit 51, and a control circuit 52. The incoming call and dialing determination circuit 50 determines on which dedicated line the leased line interface section 2 received the call, and further receives incoming dial detection data sent from the leased line interface section 2.

The corresponding key telephone is determined from the data.

The data transmitting/receiving circuit 51 receives button press information of the button telephone from the data interface 441, and transmits data such as lamp data and incoming calls to the data interface 41. The control circuit 52 sends and receives various types of data, and depending on the content of the data, controls dialing, transfer, etc. at the time of calling the call path formation 1 to the call path switch section 3, and controls the acquisition of the leased line to the leased line interface section 3. conduct.

The leased line interface unit 2 includes a changeover switch circuit 20
tt 20ze..., 20n, arriving from each dedicated line □□
” line capture circuits 22192221..., 22n. The changeover switch circuits 20l, - 20n are connected to the incoming call and dial detection circuit side to detect incoming calls, except when a call is being made.

Now, when there is an incoming call on the leased line Ll, the incoming call and dial detection circuit 21 detects the incoming call, generates incoming call data indicating which leased line the incoming call is on, and - detects the incoming dial signal and dials the dial number. Data is generated and sent to the incoming call and dialing determination circuit 50, respectively. When the incoming call and dialing determination circuit 50 determines that the received data is incoming call data, it notifies the control circuit 52 of this fact, and the control circuit 52 thereby controls the call path switch unit 3 to change the leased line L1 to the corresponding call line. Connect to 341.

Subsequently, the incoming call and dialing determination circuit 50 receives the number data of the incoming dialed call and determines the corresponding key telephone.

Assuming that the button telephone 71 is identified by this determination result, the control circuit 52 transfers the incoming data to the button telephone 71 via the data transmission/reception path 1 to the air H2, -7.
Send to 8-341. The data interface 41 notifies the key telephone 71 of the incoming call using the incoming call data, and also informs the voice interface 40 of the incoming call via the telephone line 34.
! and the button telephone 71 are connected. When the key telephone 71 responds to the incoming call from the leased line L1, data indicating the response is sent from the key telephone 71 to the control circuit via the data interface 41 and the data transmitting/receiving circuit 51, and the control circuit 52 receives the call from the leased line interface 2. Switch the selector switch 201 to the dedicated line capture circuit 221.
A DC loop is formed. This allows two-way communication.

Note that when the incoming call and dialing determination circuit 50 determines that an incoming call is dialed from a leased line to the key telephone 71, if the key telephone 71 is busy with another leased line, the control circuit 52 disables this call. The busy state is recognized by data from the button telephone 71, and the busy tone is transmitted to the dedicated line Ll.
A tone source (not shown) is controlled to transmit a tone.

In the above explanation, the operation is performed when there is an incoming dial signal from the key telephone 7 on the dedicated line Ll, but the operation is the same even when the incoming dial signal is on another dedicated line.

〔Effect of the invention〕

As explained above, the present invention detects an incoming call and an incoming dial signal from a leased line, and connects the key telephone specified by the incoming dial signal among a plurality of key telephones to the leased line on which the incoming call occurred. It has the effect of connecting.

[Brief explanation of the drawing]

The drawing is a block diagram showing the configuration of an embodiment of the present invention. 1... Main device, 2... Dedicated line interface section, 3... Call path switch section, 4...
...Telephone interface unit, 5...Control unit, Ll, ~, Ln...Dedicated line, TI, ~
eTm...Push-button telephone. fart

Claims (1)

[Scope of Claims] A button telephone, a telephone interface section that accommodates a connection line of the button telephone, a leased line interface section that accommodates a plurality of leased lines, and a call line that connects the button telephone and the leased line. In a button telephone device including a switch section, the telephone interface section, and a control section that controls the leased line interface section and the call path switch section, the leased line interface receives an incoming call and an incoming dial signal from the leased line. and means for detecting and sending an incoming call and dialing detection signal to the control unit, wherein the control unit detects an incoming call to the leased line according to the incoming call and dialing detection signal from the leased line interface unit, and transmits an incoming call and dialing detection signal to the leased line. 1. A button telephone device comprising: means for determining a designated key telephone; and means for controlling connection between the designated key telephone and the leased line.