JPS62216599A - Key telephone system - Google Patents

Abstract

PURPOSE:To sound-call a callee through a speaker built in a key telephone set during the calling from a calling side by detecting an additional dial signal determined beforehand from the calling side and closing a channel path from a private line to the key telephone set. CONSTITUTION:While the callee is called by an audible sound, when an additional dial determined beforehand is sent from the private line Lk, a dial signal detecting circuit 21k detects this, and through a dial signal deciding circuit 22, additional dial data are sent to a control circuit 50. By the data, the control part 50 sends the data to change from an audible sound calling to a sound calling through a data transmitting/receiving circuit 51 to a data interface circuit 31, closes the channel corresponding to the private line Lk of an interface circuit 23, controls a channel switch part 4 and links the private line Lk and the calling line of a key telephone set Ti. The circuit 31 controls the key telephone set Ti based upon the data sent from the control circuit 50 and changes over the speaker built in the Ti from an audible sound source to a calling line.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a button telephone device, and particularly relates to a key telephone device that is directly connected to a leased line and that can be used to receive calls from an audible call by a predetermined additional dialing signal. This relates to a key telephone device that can be switched to voice calling.

[Conventional technology]

In conventional key telephone devices, when making a call from a leased line, a method is generally adopted in which the call from the leased line is made using an audible tone.

[Problem that the invention seeks to solve]

With the above-mentioned conventional key telephone device, only an audible tone can be used when calling from a dedicated line, so the called party does not know who the caller is until they pick up the receiver and answer the call. Moreover, when you want to make a simultaneous call via a dedicated line and send a message to all the called parties at the same time, you cannot make a voice call, which is extremely inconvenient. .

[Failure to solve the problem]

The present invention provides a telephone interface section for accommodating a connection line of a button telephone, a leased line interface section for accommodating a plurality of leased lines, a call path switch section for connecting the button telephone and the leased line, and a telephone interface section for connecting the button telephone and the leased line. and a control circuit section for controlling the leased line interface section and the call path switch section, which detects a 7# telephone dial signal and controls the corresponding key telephone from the calling party during an individual call with an audible tone. means for closing the communication path from the leased line to the key telephone by detecting a predetermined additional dialing signal; and means for making a voice call to a called party through a speaker.

[Effect]

In the present invention, by detecting a predetermined additional dialing signal from the calling party, the calling party makes a voice call to the called party through the speaker built into the key telephone that is currently calling.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In the figure, 1 is a main device, and the main device 1 includes a dedicated line interface unit 2 accommodating a plurality of dedicated +ilj Ll lL2...Ln, and a key telephone T11'I'.
2...Trn connection line accommodating the telephone interface unit 3 and the button telephones T1 to Tr! 1 and the communication path switch section 4 which connects the above-mentioned dedicated lines L1, L2, etc.

It includes a control circuit section 5 that controls the leased line interface section 2, the telephone interface section 3, and the communication path switch section 4.

The leased line interface unit 2 includes N signal detection circuits 200, 20□...20n and dial signal detection circuits 210, 21 . . . 21n, a dial signal determination circuit 22, and an interface circuit 23, the telephone interface section 3 includes a voice interface circuit 30 and a data interface circuit 31, and the control circuit section 5 includes a control circuit 50 and a data transmission/reception circuit 5.
1.

The main device 1 of this button telephone device is dedicated to rnJ books 1L1rL! ...accommodates Ln, and also accommodates ``m
It accommodates '' button telephones T, T2...T, n.

The dedicated lines L1 to Ln are connected to the communication path switch section 4 via the dedicated line interface section 2, and the voice lines of the key telephones T1 to Tm are connected to the communication path switch section 4 via the telephone interface section 3. The data lines are connected to the control circuit section 5, respectively.

This key telephone device detects an incoming dial signal and, while the corresponding key telephone is individually ringing with an audible tone, detects a predetermined additional dial signal from the calling party, thereby connecting the key telephone to the dedicated line. and means for allowing the calling party to make a voice call to the called party through a built-in speaker of the key telephone that is being called instead of the audible ringing tone.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

First, a dedicated 1i (not shown)! Lk to fI! When a call is received, the incoming signal detection circuit 2 of the leased line interface section 2
An incoming signal is detected at 0k, and the detection signal is sent to the control circuit 50 of the control circuit section 5.

At the same time, the dial signal from the dedicated line Lk is detected by the dial signal detection circuit 21k, decoded by the dial signal determination circuit 22, and sent to the control circuit 50 of the control circuit unit 5 as dial data. Then, in the control circuit 50, 71! is sent from the leased line interface section 2!
Based on the compensation detection data and dial data, an incoming call is sent from the dedicated line Lk to the data interface circuit 31 of the telephone interface unit 3 via the data transmission/reception circuit 51 by pressing a button designated by the calling side (not shown) on the object board Ti. Sends data indicating that. In this data interface circuit 31, based on this data, the button telephone T1
The incoming data from the leased line Lk is sent only to the designated line Lk. As a result, only the key telephone Ti blinks the outside line lamp corresponding to the dedicated line area according to the incoming call data, and outputs an audible tone generated inside the key telephone T1 from the built-in speaker of the key telephone Tl, and the called party to inform the dedicated line Lk that incoming calls will be blocked.

The called party usually answers in this state.

That is, by picking up the handset, response data is transferred from the key telephone Ti to the data interface circuit 31.
and is sent to the control circuit 50 via the data transmission/reception circuit 51. The control circuit 50 uses this response data to control the interface circuit 23 of the leased line interface section 2.
The communication path corresponding to the dedicated line Lk is closed, and the communication path switch unit 4 is controlled to connect the dedicated line Lk and the communication line of the key telephone Tl. As a result, the called party of the button telephone T1 can communicate with the voice interface circuit 30 of the telephone interface section 3, the communication path switch section 4, and the interface circuit 23 of the leased line interface section 2.
Two-way communication is possible with the caller of the leased line Lk throughout.

However, while calling the called party using an audible tone,
When a special number predetermined as an additional dial is sent from the leased line Lk, the dial signal detection circuit 21k of the leased line interface section 2 detects the additional dial, and the dial signal determination circuit 22 Additional dial data is sent to the control circuit section 50 via the control circuit 50. In the control circuit 50, this additional dial immediately sends data to the data interface circuit 3 of the telephone interface unit 3 via the data transmitting/receiving circuit 51.
1, transmits data for changing from an audible call to a voice call, closes the communication path corresponding to the dedicated line Lk of the interface circuit 23 of the dedicated line interface section 2, and controls the communication path switch section 4 to ILk and button 1! Connect the communication line of the boat T1.

Then, the data interface circuit 31 of the telephone interface section 3 controls the key telephone Tl based on the data sent from the control circuit 50, and switches the built-in speaker from the audible sound source to the telephone line inside the key telephone Tl. .

This means that the communication path from the built-in speaker of the key telephone Tl to the leased line Lk has been established, and the caller on the leased line Lk is communicating with the called party on the key telephone Ti specified by the caller on the leased line Lk. Voice calls are now possible.

In the above explanation, the realization of a voice call using a single button telephone has been described as an example, but the present invention is not limited to this, and of course can be applied not only to a single button telephone.
It goes without saying that a group call or a simultaneous call of key telephones is not an audible call, but that all corresponding key telephones can be simultaneously called by voice by additional dialing.

FIG. 2 is a block diagram showing an example of the configuration of a button telephone for realizing the present invention.

In the figure, 100 is a button telephone, 101 is a voice interface terminal, and IQ2 is a data interface terminal. This button telephone 100 includes a data transmitting/receiving circuit 103. Control circuit 1o4゜Ring tone generation circuit 1
05. Switching circuit 106. Amplification circuit 107, built-in speaker 108. Comprising a switching circuit 109 and a handset 110,
The speech line is connected to the voice interface circuit 30 of the telephone interface section 3 of FIG. 1 through the voice interface terminal 101, and the data line is connected to the data interface circuit 31 of the telephone interface section 3 of FIG. 1 through the data interface terminal '102. has been done.

Next, the operation of the button telephone shown in FIG. 2 will be explained.

First, the incoming data signal is sent to data interface terminal 1.
02 to the control circuit 10 via the data transmission/reception circuit 103.
4, this control circuit 104 controls the ring tone generation circuit 105 to output an audible tone, and also controls the switching circuit 106 to switch to side a in the figure. As a result, the audible sound from the ringtone generation circuit 105 is transferred to the switching circuit 10.
After being amplified by the amplifier circuit 107 via the built-in speaker 1
It will be played in 08.

Next, at this time, when the voice call data signal is input from the data interface terminal 102 to the control circuit 104 via the data transmission/reception circuit 103, this control circuit 1
04 controls the ringtone generation circuit 105 to stop the audible tone, controls the switching circuit 106 to switch to side b in the figure, and further controls the switching circuit 109 to switch to side C in the figure.

As a result, the caller's voice signal from the voice interface terminal 101 is transferred to the switching circuit 109 and the switching circuit 10.
After being amplified by the amplifier circuit 107 through the built-in speaker 1
It is played back in 0B and can be used for voice calls.

Then, when the voice called party responds by lifting the handset 110, the control circuit 10 simultaneously
4 controls the switching circuit 109 to switch to the d side in the figure. This allows the called party to connect the calling party to the handset 11.
0, you can make two-way calls.

〔Effect of the invention〕

As explained above, according to the present invention, by detecting a predetermined additional dialing signal from the calling party, the calling party can press the calling button to send the called party through the built-in speaker. The effect of voice calling is bad.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a block diagram showing an example of a button telephone for implementing the present invention. 1... Main device, 2... Dedicated line interface section, 3... Telephone interface section, 4...
Call switch section, 5...Control circuit section, 20□~20
n...Incoming signal detection circuit, 21□~21n...
Dial signal detection circuit, 22, . . ., dial signal determination circuit, 30, . . . voice interface circuit, 3
1...Data interface circuit, 50...
Control circuit, 51... Data transmission/reception circuit, 100...
・・Key telephone, 108・・・Speaker, T1
~Trr1... ...button telephone. .

Claims (1)

[Claims] a telephone interface section that accommodates a connection line of a button telephone; a leased line interface section that accommodates a plurality of leased lines; a call path switch section that connects the button telephone and the leased line; and the telephone interface section and the dedicated line. In a button telephone device including a line interface section and a control circuit section that controls the call path switch section, a caller side detects an incoming dial signal and makes a predetermined call from the calling side while the corresponding button telephone is being individually called by an audible tone. means for closing a call path bus from the leased line to the button telephone by detecting the additional dialing signal that has been set;
1. A button telephone device, characterized in that the button telephone device comprises means for allowing a calling party to make a voice call to a called party through a built-in speaker of the key telephone device which is being called instead of the audible ringing tone.