JPS63190464A - Key telephone set - Google Patents

Abstract

PURPOSE:To prevent a user from hooking off a handset in error when a data is sent to a facsimile equipment by providing a 1st changeover means between a talking line and a channel circuit section and a 2nd changeover means between a talking line and an accessory line connecting to a general terminal equipment. CONSTITUTION:The 1st switching means 307 connecting/disconnecting a talking line 202 and a talking circuit section 305 and the 2nd changeover means 308 connecting or disconnecting a talking line 202 and an accessory subscriber line 203 connecting to a general terminal equipment 400, and a control means 301 using a signal sent through a data talking line 201 from an electron exchange 100 to control the 1st changeover means 307 and the 2nd changeover means 308 are provided. When either a general terminal equipment 400 or a pushbutton telephone set 300 is in use, since the other cannot be in use, even if the user hooksoff the handset 306 of the set 300 in error while a data or a voice is sent to the general terminal equipment 400, the data or voice is sent to the general terminal equipment 400.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a button telephone.

BACKGROUND OF THE INVENTION Conventional pushbutton telephones are electrically connected to an electronic exchange via a voice line and a data line, and are configured so that calls can be made while signals are exchanged between the pushbutton telephone and the electronic exchange.

In recent years, there has been a demand for connecting a button telephone to one extension and attaching a general terminal device such as a facsimile to the button telephone, so some button telephones have been configured so that a general terminal device can be attached to the button telephone.

Problems to be Solved by the Invention However, in conventional button telephones, the button telephone is connected to one extension, and a general terminal device is connected to the button telephone, and the button telephone and the general terminal device have the same extension number. As a result, when a facsimile machine was connected as a general terminal device, there were cases where the user accidentally lifted the handset of the key telephone while data was being transferred to the facsimile machine, and the data was not transferred properly to the facsimile machine.

Means for Solving the Problems In order to achieve this object, the button telephone of the present invention includes a first switching means for connecting and disconnecting a telephone line and the telephone circuit section, and a general terminal device. a second switching means for connecting and disconnecting the attached attached subscriber line and the telephone line; and a signal sent from the electronic exchange through the data communication line to the first switching means and the second switching means. The configuration includes a control means for controlling the switching means.

Effect: With the configuration described above, when either the general terminal device or the key telephone is using an extension line or a central office line, the other cannot (or can) use it.

Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram when a button telephone is connected to an electronic exchange and a general terminal device is connected to the button telephone according to an embodiment of the present invention.

100 is an electronic exchange. Ikube on the electronic exchange 100,
105 is a subscriber circuit section that supplies DC loop current to the subscriber line 202 and performs coupling in the voice band.

109 is a DC loop monitoring section 107 and a subscriber circuit section 105
It is a relay contact that connects the DC loop monitoring section 107 and the bell signal generation section 108, and switches the connection between the DC loop monitoring section 107 and the bell signal generation section 108.
b is a terminal of the subscriber circuit section 105, and b is a terminal of the bell signal generating section 10.
8 terminals. A data communication unit 102 is connected to the data communication line 201 and performs data communication with the button telephone 300. DC loop monitoring unit 107 explained above
, the subscriber interface section 110 by the bell signal generation section 108, the subscriber circuit section 105, and the data communication section 102.
is configured. Reference numeral 103 denotes a central office line trunk unit connected to a central office line 204 from an external exchange and providing an electrical interface with the central office line 204. 104 has multiple extensions,
It is a communication path section that performs switching connections between external lines, and is a multi-DTM
The F receiving section 106 is connected to the communication path section 104 together with the office line trunk section 103 and the subscriber circuit section 105. That is, it can be connected to the subscriber circuit section 105 through the communication line section 104, and the subscriber line 202 can be connected from the general terminal device.
The multi-frequency selection signal transmitted through the DC loop monitoring section 107 and the subscriber circuit section 105 can be received. 101 is a data communication section 102 and a DTMF receiving section 1
This is a control unit that receives information from 06 and other devices and controls the subscriber interface unit 110, the communication path unit 104, the office line trunk unit 103, etc. 111 is an audible sound generator that generates an audible sound signal.

Next, the configuration of button telephone 300 will be explained. 3
02 is a data communication unit that exchanges signals with the electronic exchange 100 through the data communication line 201; 303 is a data communication unit that sends a ringtone to the user, and displays an incoming call lamp, an in-use lamp, and another terminal-in-use lamp to the user; display section, 30
Reference numeral 4 designates an operation unit provided with a dial button, an outside line selection button, and other function buttons for controlling the functions of the layered slave exchange 100, and 305 represents a communication circuit unit that enables a voice call using a receiver 306. 307 is a relay contact that connects the subscriber line 202 and the communication circuit section 305; 308 is a relay contact that connects the subscriber line 202 and the attached subscriber line;
09 is an audible sound generator. 301 receives input from the operation unit 304 and input from the relay contacts 307 and 308, and controls data input/output to and from the data communication unit 302, controls the display unit 303, controls the call circuit unit 305, etc. This is the control section.

The operation when a key telephone is connected to the electronic exchange of this embodiment configured as described above and a general terminal device is connected to the key telephone will be explained using the sequence flow shown in FIG. 2 and FIG. 5.

FIG. 2(a) shows a button telephone 300 connected to a subscriber line 202 from an electronic exchange 1oo and an attached subscriber line 2.
2(b) is a sequence flow when the general terminal device 400 connected to 03 receives a call at the same time and the key telephone 300 goes off-hook first, and FIG. 2(b) shows the sequence flow when the general terminal device 400 goes off-hook first. It is.

When a bell signal arrives at the electronic exchange 100, the electronic exchange 1
00 is the data communication line 20 for the button telephone 300
The control section 301 of the button telephone 300 causes the display section 303 to display an incoming call based on the incoming call data. In addition, the control unit 10 of the electronic exchange 100
1 is a relay contact 109 for the general terminal device 400.
is switched to the terminal side, the bell signal generating section 108 and the DC loop viewing section 107 are connected, and a bell signal is sent to the general terminal device 400 through the subscriber line 202, the relay contact 308, and the attached subscriber line 203. General terminal device 400
The bell rings using the bell signal. Next, when the handset 306 of the button telephone 300 is off-hook, the control unit 301
Then, off-hook data is sent to electronic exchange 100 through data communication line 201. The control unit 101 transmits the response data to turn off, and at the same time closes the relay contact 1.
09 to the terminal a side, the DC loop monitoring section 107 and the bell signal generating section 108 are disconnected and connected, and the bell signal is stopped, thereby stopping the bell of the general terminal device. When the button telephone 300 receives the response data sent from the control section 101, the control section 301 causes the display section 303 to display that the subscriber line is in use, and at the same time closes the relay contact 307 and opens the relay contact 308. Then, the attached subscriber line 203 is disconnected from the subscriber line. When the general terminal device goes off-hook after the bell stops, the attached subscriber line 203 from the subscriber 1111I202 of the relay contact 308 is disconnected from the subscriber line 202. After the bell stops, the general terminal device 400 connects the relay contact 30
8 is opened, the subscriber line 202 is connected to the attached subscriber line 203.
Since the key telephone 300 is disconnected, it becomes unusable, and it becomes impossible to eavesdrop on calls made by the key telephone 300 from a general terminal device. When the button telephone 300 goes on-hook, it recognizes that the electronic exchange 10 has terminated the call and sends response data back to the button telephone 300. Based on the response data, the button telephone f1300 causes the display unit 303 to indicate that it is not in use, and at the same time opens the relay contact 307 and contacts the relay contact 308.
The subscriber line 202 and attached subscriber line 203 are connected, and the general terminal device 400 can be used.

When a bell signal arrives at the electronic exchange 100, the incoming call data is sent to the key telephone 300 through the data communication line 201, and the control section 301 of the key telephone 300 causes the display section 303 to display an incoming call based on the incoming call data. Further, the control section 101 switches the relay contact 109 to the terminal side for the general terminal device 400, and the bell signal generation section 10
8 and the DC loop monitoring unit 107, and the subscriber line 202
, relay contacts 308, and each attached line 203, a bell signal is sent to the general terminal device 400. The general terminal device 400 rings a bell using a bell signal. Next, when the general terminal device 400 goes off-hook, the general terminal device 400 connects the attached subscriber line 203, the relay contact 308, and the subscriber line 20.
2 to close the DC loop. When the electronic exchange 100 detects the closure of the DC loop of the general terminal device 400 by the DC loop monitoring unit 107 and recognizes the incoming call response, the control unit 101 returns response data indicating that the incoming call response has been recognized to the button telephone 300. At the same time, the relay contact 109 is switched to the terminal a side, the DC loop monitoring section 107 and the bell signal generating section 108 are disconnected, and the bell signal to the general terminal device is stopped, thereby stopping the bell of the general terminal device 400. Control part 3
01 causes the display unit 303 to display that the subscriber line 202 is in use by the general terminal device 4oO and that another terminal is in use, based on the response data. When the other end is displayed as unused, the relay contact 307 is not closed even if the button telephone 300 goes off-hook because the other end is unused.
It is not possible to eavesdrop on calls made by the general terminal device 400. Next, when the general terminal device goes on-hook, the DC loop is opened through the attached subscriber line 203, the relay contact 308, and the subscriber line 202. The electronic exchange 100 includes a DC loop monitoring section 107
The control unit 101 recognizes that the call has ended due to the opening of the DC loop of the general terminal device 400, and transmits the response data indicating that the general terminal device 400 is on-hook to the button telephone 300.
send it back to Based on the response data, the control unit 301 displays on the display unit 303 that the subscriber line 202 is open and indicates that it is not in use, and at the same time the button telephone 300 becomes ready to use the subscriber line 202. . The above explanation is for the case of simultaneous incoming calls, but the key telephones 300 of the same extension
Also, individual incoming calls to the general terminal device 400 can be easily realized by individually transmitting the incoming data and the bell signal.

Next, FIG. 3(a) shows a sequence flow when the button telephone 300 first goes off-hook to make a call, and FIG. 3(b)
) is a sequence flow when the general terminal device 400 first goes off-hook to make a call. First, button phone 11
When the telephone 300 goes off-hook to make a call, the control unit 301 transmits the off-hook data to the electronic exchange 100 through the data communication line 201, and the electronic exchange 1100 transmits the off-hook data to the button telephone 30.
0, the control unit 101 recognizes the calling state of the button telephone 3.
Returns response data to 00. Based on the response data, the control unit 301 causes the display unit 303 to indicate that it is in use, and at the same time closes the relay contact 307 to connect the subscriber line 202 and the communication circuit unit 305, and opens the relay contact 308 to connect the subscriber line 202 and the communication circuit unit 305. and the attached subscriber line 203, making the general terminal device 400 unusable. Next, when the button telephone 300 dials, the dial data is received by the electronic exchange 100, and the electronic exchange 100 calls the other party based on the dial data. The subsequent sequence flow of the destination response is the same as the sequence flow 570 in FIG. 2(a). Next, general terminal device 4
If 00 goes off-hook first, the DC loop is closed through the attached subscriber line 203, the relay contact 308, and the subscriber line 202. The DC loop monitoring unit 107 detects the closure of the DC loop, the control unit 101 recognizes the calling state, and sends response data to the button telephone 300. Based on the response data, the control unit 301 displays the display unit 303 to indicate whether another terminal is being used. At the same time, the relay contact 307 is rendered uncloseable, and the button telephone 300 is rendered unusable. Next, when the general terminal device 400 dials, a dial signal is sent to the electronic exchange 100 through the attached subscriber line 203, the relay contact 308, and the subscriber line 202.

If the dial signal from the general terminal device is a DTMF signal, the electronic exchange 100 receives it at the DTMF receiving unit 106, and if the dial signal is a pulse dial signal, it is used as a DC loop open/close signal to monitor the DC loop. Part 10
7 and calls the corresponding party. The subsequent response sequence of the other party is sequence flow 5 in Fig. 2(b).
Same as 80.

Next, FIG. 4 shows the same subscriber line 202 of the electronic exchange 100.
This is a sequence flow when a call is made from the button telephone 11300 connected to the button telephone 300 and received by the general terminal device 400 connected to the attached subscriber line 203 of the button telephone 300. Send button phone data. When electronic exchange 100 receives off-hook data through data communication section 102, it enters a calling state, and control section 101 returns response data to key telephone 300.

The button telephone 300 displays information on the display section 303 according to the response data.
In addition, the relay contact 307 is closed and the relay contact 308 is opened to make the general terminal device 400 unusable. Next, when a dialing operation is performed to call the general terminal device 400 connected to the attached subscriber line, dial data is sent to the electronic exchange 100 through the data communication line 201. When the control unit 101 receives dial data from the button telephone 300, it switches the relay contact 109 to the terminal side, connects the bell signal generation unit 108 and the DC loop monitoring unit 107, and connects the subscriber line 202, the relay contact 308, Through the attached subscriber line 203, a bell signal is sent to the general terminal device 400, and response data is sent back to the button telephone 300.
0 opens the relay contact 307 and closes the relay contact 308 according to the response data so that a bell signal is sent to the general terminal device 400 through the attached subscriber line 203.

Further, the button telephone 300 sends a ringing tone from the audible tone generation section 309 to the receiver 306 through the communication circuit section 30!5. The general terminal device 400 rings a bell using a bell signal. Next, when the general terminal device 400 responds by off-hook, the general terminal device 400 connects to the attached subscriber line 203.
, relay contact 308, and subscriber line 202 to close the DC loop. The DC loop monitoring unit 107 detects the closure of the DC loop of the general terminal device 400, recognizes the incoming call response, and the control unit 101 sends the response data back to the button telephone 300, and at the same time connects the relay contact 109 to terminal a (tPI
, disconnects the DC loop monitoring section 107 and the bell signal generation section 108, stops sending out the bell signal to the general terminal device 400, and stops the bell for the general terminal device 400. The control unit 301 stops the ringing tone based on the response data, closes the relay contact 307, and enters into a conversation state with the general terminal device 400. Next, the button telephone 300
goes on-hook first, the control unit 301 sends the on-hook data to the electronic exchange 100 through the data communication line 201.
The control unit 101 recognizes the end of the call based on the on-hook data, and at the same time sends response data back to the key telephone. The control unit 301 opens the relay contact 307 based on the response data, and causes the display unit 303 to display that the subscriber line 202 is in use by the general terminal device 400 and that another terminal is in use. Next, the general terminal device 40
0 goes on-hook, the DC loop is opened through the attached subscriber line 203, the relay contact 308, and the subscriber line 202. The DC loop monitoring unit 107 detects the opening of the DC loop of the general terminal device 400, the control unit 101 recognizes the complete end of the call, and sends response data back to the key telephone 300. The control unit 301 controls the subscriber line 20 based on the response data.
At the same time, the display unit 303 displays that the subscriber line 202 is released and that the subscriber line 202 is not in use, and the button call machine 300 becomes able to use the subscriber line 202.

Next, when the general terminal device 400 goes on-hook first from the conversation state between the key telephone 300 and the general terminal device 400, the attached subscriber line 203, the relay contact 308, and the subscriber line 2
The DC loop is opened through 02. The DC loop monitoring unit 107 detects the opening of the DC loop of the general terminal device 400, recognizes the end of the call, and sends the response data to the button telephone 300.
send it back to Based on the response data, the control unit 301 causes the display unit 303 to display that the button telephone 0300 is still capturing the subscriber line 202 and to display that it is in use, and at the same time opens the relay contact 308 and connects the general terminal device 400 becomes unusable.

Next, when the button telephone 300 is on-hook, the control unit 30
1 sends on-hook data to electronic exchange 1.00 through data communication line 201. When electronic exchange ml 00 receives on-hook data, it recognizes that the call has completely ended,
The return control unit 101 transmits the response data to the button telephone 30.
Return to 0. Based on the response data, the control unit 301
The display unit 303 displays that the subscriber line 202 is open and is not in use, and at the same time, the relay contact 307 is opened and the relay contact 308 is closed, and the general terminal device 400
Make it available for use.

FIG. 5 shows a sequence flow when a button telephone 300 is connected to the electronic exchange 100, a general terminal device 400 is in contact with the button telephone, a call is made from the general terminal device 400, and a call is received by the button telephone 300. When the general terminal device 400 goes off-hook, the attached subscriber line 20
3. Close the DC loop through the relay contact 308 and the subscriber line 202. The DC loop monitoring unit 107 detects the closure of the DC loop, and the control unit 101 detects the closure of the DC loop.
recognizes the calling status of the button telephone 300 and sends the response data to the button telephone 300.
send it back to Based on the response data, the control section 301 causes the display section 303 to display that another terminal is in use, indicating that the subscriber line 202 has been captured by the general terminal device 400, and also disables the key telephone 300. Next, when the general terminal device 400 dials the key telephone, the dial signal is transmitted to the attached subscriber line 203 and the relay contact 3.
08, is sent to the electronic exchange 1Oo through the subscriber line 202. If the dial signal from the general terminal device 400 is a DTMF signal, the electronic exchange 100 receives it at the DTMF receiving unit 106, and if the dial signal is a pulse dial signal, it receives the DC loop as a DC loop opening/closing signal. The loop monitoring unit 107 receives the data, and the other party is called, and the control unit 101 sends the incoming call data to the button telephone 300.
4, subscriber circuit section 105, relay contact 109, DC loop monitoring section 107, subscriber line 202, relay contact 308,
A ring tone is sent to the general terminal device 400 through the attached subscriber line 203, so that the general terminal device 400 can hear the ring tone. The control unit 301
The incoming call is displayed on the display unit 303 based on the information of the incoming call data. Next, when the button telephone 300 goes off-hook, the control section 301 sends off-hook data to the data communication line 201. When the control unit 101 receives off-hook data from the button telephone 300, the controller 101
recognizes that the telephone has answered the incoming call, and at the same time sends response data to that effect back to the button telephone, the audible sound generating section 1
The calling signal that was being sent from 11 is stopped. When the control unit 301 receives the response data, it stops displaying the incoming call on the display unit, and at the same time closes the relay contact 307 to enter into a conversation state with the general terminal device 400. Thereafter, the sequence for ending the call end state is the same as the sequence flows 760 and 770 in FIG. 4. 6, 7, 8, and 9 are flowcharts of the control unit 101 showing the extension-to-line incoming and outgoing processing of the electronic exchange 100.

Step 901 in FIG. 6 is a determination step when there is an incoming call from another extension or outside line, and if there is no incoming call at the electronic exchange 100, the next step 902 is executed.
If there is an incoming call, the process moves to step 960 in FIG. In step 902, the control unit 101 detects an off-footer of the button telephone 300 by receiving off-hook data transmitted through the data communication line 201, and if no off-hook data is received, executes the next step 903,
Upon receiving off-hook data, step 920 of FIG.
Execute. In step 903, the control unit 101 causes the general terminal device 400 connected to the attached subscriber line 203 to connect to the attached subscriber line 203 and the relay contact 308 by off-footer.
The DC loop monitoring unit 107 captures the subscriber line 202 through
This is a step of detecting that the DC loop is closed. If the loop is closed, the next step is step 904.
and if the loop is not closed, step 9
Return to 01. The repetition of steps 901, 902, 903, 901, etc. indicates the waiting state of the extension.

In step 904, when the control unit IO1 detects the DC loop closure of the general terminal device 400 in step 903, it sends response data to the button telephone 300 indicating that the general terminal device 400 is using the subscriber line 202. Causes sending to take place. In step 905, the DTMF receiving section 106 is connected to the communication path section 104, and the DTMF dial signal sent from the general terminal device 400 is sent to the attached subscriber line 203, the relay contact 308, the subscriber line 202, and the DC loop monitoring section 1O7.
, relay contact 109, subscriber circuit section 105, communication path section 1
04, the DTMF receiving unit 106 prepares to be ready for reception. This step also prepares the DC loop monitoring unit 107 to be ready to receive pulse dials so that it can also receive pulse dials sent from the general terminal device 400.

Step 906 is a step of determining whether the dial signal sent from the general terminal device 400 has been received; if the dial signal is not confirmed, step 906 is repeated;
Once confirmed, the process moves to the next step 907. Step 9
07 is a step for determining whether or not to call the key telephone 300 of the same extension; if a different extension is to be called, the process proceeds to step 908 and the other party is called; if the key telephone 300 of the same extension is to be called, the process proceeds to step 911. Then, the incoming call data is sent to the key telephone 300 on the same extension. Step 909 is a step for determining whether or not the other party answers when calling another extension. If the other party answers, the process moves to step 968 in FIG. Abandonment of a call to the other party is detected by opening the DC loop of the terminal device 400. If the DC loop remains closed in step 910, steps 908, 909, 910, 908, . When the opening of the DC loop is detected in step 910, it is assumed that the call to the other party by the general terminal device 400 has been abandoned, and the process moves to step 914, where response data indicating that the subscriber 1i*202 has been released is sent to the key telephone 300. Step 91 of sending response data
After 4, the process returns to step 901 and enters a standby state. In step 911, the incoming call data is sent to the key telephone 300 on the same extension, and a call is made. In step 912, whether or not the key telephone 300 that is calling has responded with an off-footer is determined by receiving off-hook data; if it remains on-hook, the process moves to the next step 913;
The process moves to step 940 in the figure. In step 913,
Similarly to step 910, a decision is made to abandon the call due to the DC loop release of the general terminal device 400, and if the DC loop remains closed, step 911 and step 9
12, step 913, step 911, . . . are repeated, and when the DC loop is opened, the process moves to step 914, and then enters a standby state.

Step 920 in FIG. 7 is a step that is executed when the key telephone 300 receives off-hook data in step 902, and the key telephone 300 sends out response data indicating that the subscriber line 202 can be used, and at the same time sends response data to the relay contact 307. and opens the relay contact 308, enabling the use of the subscriber line 202 of the button telephone 300 and prohibiting the use of the subscriber line 202 of the general terminal device 400. In step 922, preparations are made to receive dial data from the key telephone 300 through the data communication line 201. In step 923, the incoming dial data is confirmed, and step 923 is repeated until confirmed. When confirmed, the process moves to the next step 924, and whether the calling target is another extension or the general terminal device 400 within the same extension is called. If the call is to another extension, the other party is called at step 925, and if the call is to the general terminal device 400 within the same extension, the call is made to the other party. , in step 929, the attached subscriber line 2
03 is connected to the general terminal device 400 to the key telephone 300, the relay contact 307 is opened and the relay contact 308 is closed. device 4000
Be prepared to send out a bell signal. In step 926,
In step 925, it is determined whether or not there is a response from the other party being called. If there is a response, the process moves to step 973 in FIG. Determines call abandonment. If no on-hook data is received in step 927, steps 925, 926, 927, etc. are repeated, and if on-hook data is received, the call is considered abandoned and the next step 92
At step 8, response data indicating that the subscriber line 202 is to be opened is sent to the key telephone 300, and the relay contact 307 is opened and the relay contact 308 is closed. Thereafter, the process moves to step 901 in FIG. 6 and enters a standby state. In step 930, the relay contact 109 is connected to the terminal side, and the HELL signal generated by the bell signal generator 108 is transmitted to the relay contact 109, the DC loop monitoring unit 107, and the subscriber line 20.
2. It is sent to the general terminal device 400 through the relay contact 308 and the attached subscriber line 203. In step 912, the general terminal device 400 determines whether the DC loop is closed for response. If the DC loop is closed, the process moves to step 941 in FIG. 8, and if the DC loop is not yet closed. If not, the process moves to the next step 932, and it is determined whether the call has been abandoned due to the button telephone f1300 being turned off or ivy. If the on-hook data is not H2 in step 932, the process moves to step 930, and step 9301
Step 931, Step 932, Step 9301.
··repeat. When on-hook is recognized in step 932, in the next step 933, response data indicating that the subscriber line 202 has been released is sent, and then the system shifts to a standby state.

In step 940 of FIG. 8, in response to the off-footer response of the button telephone 300 in step 912-, response data indicating that a communication state has been established with the general terminal device 4000 is sent, and the relay contact 307 is closed to join. person line 2
02 is captured and the general terminal device 400 and the button telephone 300
A conversation is established using the subscriber line 202 with the subscriber line 202. Next, in step 943, the end of the call is determined by the on-hook of the key telephone 300, and if on-hook data is received, the process moves to step 950, and if no on-hook data is received, the process moves to the next step 944, and the general terminal The end of the call is determined by opening the DC loop of the device @400. In step 944, if opening of the DC loop is not detected, the process moves to step 943, and steps 943, step 944, step 943, etc. are repeated, and if opening of the DC loop is detected, step 945 , the general terminal device 400 sends response data indicating that the call has ended to the button telephone 300 , and the relay contact 308
The general terminal device 400 is disconnected from the subscriber line 202. Then, in step 947, the button telephone fi
300 on-hook data is received, and if it is still off-hook, repeat step 947.
When on-hook data is received, in step 948 response data indicating that the subscriber line 202 has been released is sent to the key telephone 300, and the relay contact 307 is opened and the relay contact 308 is closed. Thereafter, the process moves to step 901 and enters a standby state. In step 950, upon confirmation of the on-hook of the key telephone 300 in step 943, the general terminal device 400 sends out response data indicating that it is still capturing the subscriber line 202, and opens the relay contact 307. 300 is disconnected from the subscriber line 202. Next step 9
At step 52, the end of the call is detected by opening the DC loop of the general terminal device 400. If the general terminal device 400 is still in the DC loop, step 952 is repeated, and when the DC loop is opened, the button is pressed at step 953. After sending response data to the telephone 300 to the effect that the subscriber line 202 has been released, the process moves to step 901 and enters a standby state.

If it is determined in step 901 of FIG. 9 that there is an incoming call, it is determined again in step 960 whether or not there is an incoming call. Step 9
60, if there is no incoming call, step 90 in FIG.
This is a step to shift to 1 and restore the standby state. In step 961, it is determined whether or not an incoming call has occurred to the key telephone 300, and the key telephone 300
If an incoming call has occurred, execute the next step 9611 and step 962; if not, execute step 9.
61. Step 962 is not executed. In step 961, the incoming call data is sent to the key telephone 3oO. Further, step 962 is a step for determining whether or not an off-footer response has been made to the incoming call to the key telephone 300. If off-hook data is received, the process moves to step 972, and if no off-hook data is received, the next step is performed. The process moves to step 964. In step 964, the attached subscriber line 203 of the button telephone 300
This is a step of determining whether there is an incoming call to the general terminal device 400 connected to the general terminal device 400. If the incoming call has occurred to the general terminal device 400, the next step 965,
If step 966 is executed and there is no incoming call,
Step 9 without executing steps 965 and 966
Returning to step 60, it is determined whether or not the incoming call continues. In step 965, a bell signal is sent to the general terminal device W400. Further, in step 966, the response of the general terminal device 400 due to DC loop closure is determined, and if the DC loop has been closed, the process moves to step 967, and if the DC loop has not been closed, step 960
Return to step 9601, step 961, step 9
62, step 963, step 964, step 96
5. At each step of step 966, a response to an incoming call is monitored. In step 967, the general terminal device 400 responds and sends response data that already occupies the subscriber line 202 to the key telephone 300. In step 968, a connection is made to the other party who is receiving the call, and a conversation state is established. Step 9
In step 69, opening of the DC loop of the general terminal device 400 during a call is detected, and the end of the call is determined. In 96 steps,
If the DC loop has not been opened, step 96
Repeat step 9 and if an open DC loop is detected,
In the next step 970, the other party who has been on the phone is released. In step 971, response data indicating that the subscriber line 202 has been released is sent to the key telephone 300, and then the process returns to step 901 in FIG. 6 and enters a standby state.

In step 972, in step 963, the button telephone 3
00 goes off-hook and responds, and sends response data to the button telephone 300 indicating that it is possible to talk, and also closes the relay contact 307 and relay contact 3
08 is opened and the subscriber line 20 of the general terminal device 400 is opened.
The use of 2 is prohibited. In step 974, the end of the call is determined by on-hook of the button telephone 300, and if it is not on-hook, step 974 is repeated, and if it is on-hook, in the next step 975, the caller who has been on the call is released. I do. Step 97
At step 6, response data indicating that the call has been terminated is sent to the button telephone 300, and the relay contact 307 is opened and the relay contact 308 is closed, and the button telephone 300 opens the subscriber line 202. Thereafter, the process returns to step 901 and enters a standby state.

10, 11, and 12 show a button telephone 300
This is a flowchart.

First, step 1001 is a step for determining whether or not incoming data is being received from electronic exchange I'll 00. If not, the next step 1002 is performed.
Then, it is determined whether the key telephone 300 itself has gone off-hook. If the on-footer remains in step 1002, the process moves to the next step 1003,
It is determined whether or not response data indicating that the general terminal device 4OO has gone off-hook has been received. If it remains on-hook, the process returns to step 1001, and steps 1001, 10o2, 1003, and 1001
... is repeated, and the extension line is on standby.

By the way, in step 1003, the general terminal device 400
When off-hook is recognized, in the next step 10o4, a general terminal device in use display is displayed on the display unit 303, and the general terminal device 400 enters a conversation state with the receiving party. Next, in step 1005, it is determined whether or not response data indicating that the general terminal device 400 has been on-hook has been received. If the response data is still not received, step 1005 is repeated until the response data is received, and the process waits for the end of the on-hook call. I do. Then, in step 1005, when the response data is received, the process moves to the next step 1006,
Display unit 303 displays that the subscriber line is not in use, and then
Returning to step 1001, the system enters an extension standby state. Also,
In step 1002, when button telephone 300 is taken off-hook, off-hook data is sent to electronic exchange 100. Thereafter, in step 1o08, the electronic exchange 100 determines whether or not response data indicating that the off-hook of the key telephone 300 has been recognized has been received. If it has not yet been received, step 1008 is repeated and the state waits for response data reception. .

When the response data is received in step 1008, the relay contact 307 is closed in the next step 1009, and the communication circuit section 305 of the button telephone 300 is connected to the capacitor 3.
10 to the subscriber line 202, and also opens the relay contact 308, connecting the attached subscriber line 203 and the subscriber line 2.
By opening 02, the general terminal device 400 is rendered unusable. Thereafter, in step 1010, a display indicating that the device is in use is displayed on the display unit 303. Next step 10
30 and step 1031, it is determined whether the dial button is pressed and the call is abandoned due to the on-hook being determined. If the dial button is still not on-hook and the dial button is not pressed, steps 103o1, step 1031, step 1030, etc. are repeated. . When the dial button is pressed in step 1031, in step 1032,
The pressed dial data is sent to the electronic exchange @100. Thereafter, in step 1033, it is determined whether or not response data indicating that the dial data has been recognized is received, and step 1033 is repeated until the response data is received. Then, in step 1033, when response data is received,
In step 1034, depending on the information in the response data, whether the party to be called is currently on another extension or on the attached subscriber line 2.
03 is connected to the general terminal device 400, and the other party to call is the general terminal device! 400, the next step 1035 is executed, and if the party to be called is not the general terminal device Ti400, the process jumps to step 1043. In step 1035, by opening the relay contact 307, the telephone call circuit section 305 inside the button telephone 300 is disconnected from the subscriber line 202, and by closing the relay contact 308, the electronic exchange 100, a bell signal can be sent out through the subscriber line 202.

In the next step 1036, the audible tone generator 309 inside the key telephone 1300 is driven to send a ring tone to the telephone receiver 306 through the communication circuit section 3o5.

Next, in step 1037, it is determined whether to abandon the call due to on-hook, and if the call remains off-footer, then in step 1038, it is determined whether or not response data indicating that the general terminal *1400 has responded by off-hook has been received, and the response is returned. If no data is received, the process returns to step 1036 and steps 1036, 1037, and 1038 until the other party abandons the call or the other party answers.
, step 1036, . . . are repeated. By the way, when the response data is received in step 1038, the relay contact 307 is closed in the next step 1039, the subscriber line 202 and the attached subscriber line 203 are connected, and the general terminal device 400 and the button telephone 300 are connected. Make it possible to talk to. Next, in steps 1040 and 1041, end of call is detected by on-hook of key telephone 300 or on-hook of general terminal device 4OO during a call. If the response data indicating that the on-footer of the general terminal device 400 has been recognized is not received in step 1041, step 1040. Step 1041, step 1040,...
・Repeat to continue call end detection. Also, step 1
If response data is received at 041, step 1
At 042, the relay contact 308 is opened, the subscriber line 202 and the attached subscriber line 203 are disconnected, and the general terminal device 400 is disconnected from the subscriber line 202. Next step 1
At step 043, it is determined whether the button telephone 300 is on-hook, and if it is still off-hook, step 1043 is repeated, and if it is on-hook, step 10 is performed.
61, the on-hook data is sent to the electronic exchange 1oO. Next, in step 1062, it is determined whether or not response data indicating that on-hook data has been recognized has been received. If no response data has been received yet, step 1063 is repeated to wait for reception. In step 1063, when the response data is received, the process moves to step 1063, where the relay contact 307 is opened, the relay contact 308 is closed, and the subscriber line 202 is placed in a standby state. Subsequently, step 1006
At , the subscriber line is displayed as not in use, and then the process returns to step 1001 to enter the extension standby state. By the way, if on-hook of the button telephone 300 is recognized during the on-footer determination in step 1030 while waiting for the dial button to be pressed, the process moves to step 1061, and the process proceeds to step 10.
61, Step 1062, Step 1063, and Step 1006, and transition to an extension standby state. The same applies to the on-footer for abandoning the call at step 1037. By the way, when the call is ended due to on-hook of the button telephone 300 during the call in step 1040,
The process moves to step 1064, and the on-hook data is sent to the electronic exchange 100. In step 1065, response data indicating that the on-hook data has been recognized is waited for. If not received, the process continues until step 1065 is received. repeat. Then, when the response data is received in step 1065, the relay contact 307 is opened in step 1066, and the key telephone 300 is disconnected from the subscriber line 202. Subsequently, in step 1067, a display indicating that the general terminal device is in use is displayed on the display unit 303, and in step 1068, the response data reception waiting state of step 1068 is performed until response data indicating that the general terminal device 400 is on-hook is received. Continue the state. Step 106
When the response data is received in step 8, the process moves to step 1006, where the subscriber line is displayed as unused, and then moves to an extension standby state. By the way, if reception of incoming data is recognized in step 1001, an off-footer determination of the button telephone 300 is made in step 1o11, and if it remains on-hook, in the next step 1012, the electronic exchange 100 is set to normal. It is determined whether response data indicating that the off-footer of the terminal device 400 has been recognized is received. Step 1012
, and no response data is received, step 10
The process returns to step 01 and repeats step 1001, step 1011, step 1012, step 1001, . . . to continue incoming call determination and off-hook determination. In step 1012, when the general terminal device 400 recognizes that the general terminal device 400 is off-hook for an incoming call, the process moves to step 1004, executes steps 1004, 1005, and 1006, and then enters an extension standby state.

By the way, in step 1011, the button telephone 300
When the off-hook footer is recognized, the process moves to the next step 1013, and off-hook data is transmitted to the electronic exchange 100. Thereafter, in step 1014, the electronic exchange 100 determines whether or not response data has been received, indicating that the off-hook data has been recognized, and if it has not yet been received, step 1014 is repeated and the response data reception wait state is established.

Then, in step 1014, when the response data is received, in the next step 1015, it is determined based on the information included in the incoming call data whether or not the call is incoming from the general terminal device 400 on the same extension. , if the call is received from the general terminal device 400 on the same extension, the process moves to step 1039, the relay contact 307 is closed, and the key telephone 30
0 and the general terminal device 400 are in a conversation state. After that,
Determines the end of the call and transitions to an extension standby state. If it is determined in step 1015 that the incoming call is not from the general terminal device 400 on the same extension, the process moves to the next step 1016, closes the relay contact 307, connects the button telephone 300 to the subscriber line 202, and relays the call. The contact point 308 is opened to prohibit the use of the subscriber line 202 of the general terminal device 400. Thereafter, in step 1017, the display unit 303 displays a message indicating that the device is in use, and the device enters a conversation state. Next, the process moves to step 1043, and by on-hooking the button telephone Ifa300,
After determining the end of the call, it shifts to an extension standby state.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described above, there is provided a first switching means for connecting and disconnecting a telephone line and the telephone circuit section, and an attached subscriber line to which a general terminal device is connected. and a second switching means for connecting and disconnecting the communication line from the first switching means to the second switching means by a signal sent from the electronic exchange through the data communication line.
By providing a control means for controlling the switching means, when either the general terminal device or the key telephone is in use, the other cannot be used. etc. are connected and data and voice are being sent to the general terminal device, even if the user accidentally lifts the handset of the key telephone, the data and voice can be successfully sent to the general terminal device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a state in which an electronic exchange is connected to a button telephone in an embodiment of the present invention, and FIGS. 2 to 5 show a button telephone, an electronic exchange, and a general terminal device in an embodiment of the present invention. 6 to 9 are flowcharts for sending and receiving electronic exchanges to which a button telephone is connected according to an embodiment of the present invention, and FIGS. It is a 70-chart at the time of a call and a reception of a button telephone in an example. 100... Electronic exchange 101... Hoj control unit 102... Data communication unit 103... Office line trunk unit 104... Call path unit 105... Subscriber circuit unit 106...DTMF receiving section 107...DC loop monitoring section 108...Bell signal generating section 109...Relay contact 110...Power U human interface section 111...
...Audible sound generator 201...Data communication line 202...Subscriber line 203...Attached subscriber line 204...Office line 300...Key telephone 301... Control unit 302...Data communication unit 303...Display unit 304...Operation unit 30
5...Telephone circuit section, 306...Telephone receiver 30
7... Relay contact 308... Relay contact 309... Audible sound generating section 400... Name of general terminal device agent Patent attorney Toshio Nakao and 1 other person l00-Electronic exchange ll0- Subscription book Inner phase Japanese π-button telephone No. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 8: jS9 Fig. 1O Fig. 11 Fig. 12

Claims (1)

[Claims] a communication means for exchanging signals with an electronic exchange through a data communication line; a communication circuit section for sending signals to the communication line and extracting received signals from the communication line; a first switching means for connecting and disconnecting the telephone line, a second switching means for connecting and disconnecting the telephone line and the attached subscriber line to which the general terminal equipment is connected; 1. A button telephone set, comprising: a control means for controlling the first switching means and the second switching means using a signal sent through a line.