JPH06311237A - Speaking line changing method - Google Patents

Abstract

PURPOSE:To change the connection of a speaking line, which speaking state is defective, while keeping the speaking state by transmitting a speaking line change request signal from a telephone set terminal to a subscriber exchange by a speaking person in the speaking state and changing the speaking line by the subscriber exchange which receives that signal. CONSTITUTION:When a call originating side exchange 2000 receives a speaking line change request signal (XX signal) while keeping the speaking state between a call originating terminal 1000 and a call terminating terminal 4000, the telephone number of a party stored in a main storage device is extracted, and a special select signal YY is generated by the XX signal. Then, a line 720 to be connected is selected out of lines excepting for a present speaking line 710, and the connection of the YY signal is requested to a call terminating side exchange 3000 by the newly selected line 720. Since the request of the speaking line change is set to the header part of the YY signal, even when the receiver of the call terminating terminal 4000 is picked up (off hooked), the call terminating side exchange 3000 does not judge busy but connects the new line 720 and the line of the call terminating terminal 4000.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call line changing method, and more particularly to a call line adaptable to all telephone lines and exchanges when noise is mixed into the call and the call state becomes poor. The present invention relates to a call line changing method for changing a communication line by a subscriber exchange.

[0002]

2. Description of the Related Art Conventionally, when a caller changes a bad line due to noise or the like, he / she puts the handset once, interrupts the call, redials again, and makes a call again with a desired party.

FIG. 8 is a time chart showing signal transmission / reception in the conventional system. In the figure, it is assumed that the operation proceeds in time series from the top to the bottom of the figure. That is, during a call, the calling party presses the hook button on the telephone terminal to redial the dial operation to change the calling line, and the calling terminal 1000 and the calling side switching device 2 return to the calling state.
000, a called side exchange 3000, and a called terminal 4000.

Step 100) A state in which a call is being made between the calling terminal 1000 and the receiving terminal 4000.

Step 101) First, the originating terminal 1000
In the call state between the receiving terminal 4000 and the receiving terminal 4000, the calling terminal 1
When the 000 handset is lowered (on-hook), the end signal 200 is transmitted to the originating exchange 2000. Receiving the end signal 200, the originating exchange 2000 disconnects the communication line.

Step 102) Calling side exchange 2000
Sends the end signal 201 to the terminating exchange 3000.

Step 103) When the receiver of the receiving terminal 4000 hangs up (hooks on), the receiving terminal 400
A disconnection signal 202 is sent from 0 to the terminating exchange 3000.

Step 104) Called side exchange 3000
Disconnects the call line connection and sends a disconnection signal 203 to the originating exchange 2000.

Step 105) Calling side exchange 2000
Sends a restoration completion signal 204 to the destination exchange 3000.

Step 106) When the terminating exchange 3000 receives the restoration completion signal 204, the call is completed.

Step 107) Next, when the user lifts the handset of the originating terminal 1000 (off-hook), a calling signal 205 is sent to the originating exchange 2000, and the originating exchange 2000 produces a dial tone 206 to the originating terminal. Shed.

Step 108) The originating terminal 1000 sends a signal 207 to the originating exchange 2000 by dialing.

Step 109) Calling side exchange 2000
When receiving the signal 207, sends an activation signal 208 to the destination exchange 3000 to prompt the preparation for receiving the selection signal.

Step 110) Called side exchange 3000
When the activation signal 208 is received, the originating exchange 2000
The start completion signal 209 is sent to the.

Step 111) Calling side exchange 2000
When the activation completion signal 209 is received, the terminating exchange 3
000 to send the selection signal 210 to the receiving terminal 4000
The receiving side exchange 3000 makes the receiving terminal 400
The call signal 211 is transmitted to 0.

Step 112) Called side exchange 3000
Sends a ringing tone 212 to the calling terminal 1000 at the same time as step 111.

Step 113) When the receiving terminal 4000 lifts the handset (goes off hook), the receiving side exchange 300
A response signal 213 is sent to 0.

Step 114) Called side exchange 3000
When receiving the response signal 213, sends a response signal 214 to the originating exchange 2000.

Step 115) When the originating exchange 2000 receives the response signal 214, a call state is established between the originating terminal 1000 and the terminating terminal 4000.

As described above, conventionally, in order to set up a line due to a poor call status during a call between the calling terminal 1000 and the receiving terminal 4000, the call is disconnected and the line is connected again by the dial operation of the calling terminal 1000. I do.

[0021]

However, in the above-mentioned conventional method, when the caller changes a bad line due to noise or the like in a call state, the hook button is pushed (putting the handset) to end the call, There is a problem that it is a waste of time to perform the dial operation again.

The present invention has been made in view of the above-mentioned problems, and solves the above-mentioned problems of the prior art, and the subscriber exchange changes the connection of the call line while the caller maintains the call state in the call state. It is an object of the present invention to provide a call line changing method that can be used.

[0023]

FIG. 1 is a diagram for explaining the principle of the present invention.

The present invention transmits a call line change request signal for changing to a new call line from a telephone terminal to a subscriber exchange while maintaining the call state in the call state in a telephone line network, The subscriber exchange that receives the signal changes the connection of the communication line.

[0025]

In the present invention, the caller transmits a call line change request signal from the telephone terminal to the subscriber exchange in a call state, and the subscriber exchange that receives the signal changes the call line, so that the caller can By transmitting a signal to the subscriber exchange by operating the telephone terminal while maintaining the call state, the subscriber exchange that receives the signal can change the connection of another call line without interrupting the call. You can

[0026]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 2 shows the entire system of an embodiment of the present invention. In the figure, those parts that are the same as those corresponding parts in FIG. 8 are designated by the same reference numerals.

In the figure, the originating terminal 1000, the originating exchange 2000 and the terminating exchange 3000, and then the terminating terminal 40
The telephone circuit up to 00 is shown.

FIG. 3 is a time chart showing signal transmission / reception in a communication network to which the call line changing method according to the embodiment of the present invention is applied.

In the figure, it is assumed that time progresses from the top to the bottom of the figure. That is, during a call, the caller inputs from the telephone terminal 1000 to change the call line,
After the line is changed, the calling terminal 100 until the call becomes active again
0, the originating exchange 2000, the terminating exchange 3000, and the terminating terminal 4000 are shown.

Call line change request signal 300 (XX signal)
Can be transmitted from either the transmitting terminal 1000 or the receiving terminal 400. Here, it is assumed that the transmitting terminal 1000 transmits an XX signal in a call state. The call line change request signal 300 is a signal by an input operation such as dial operation from a telephone terminal for changing the call line.

Step 1) It is assumed that noise is mixed between the calling terminal 1000 and the receiving terminal 4000 during a call and the call state becomes poor.

Step 2) The originating terminal 1000 sends the XX signal 300 to the originating exchange 2000.

Step 3) The originating exchange 2000 which has received the XX signal changes the connection to another line and sends a special selection signal 301 (YY signal) to the terminating exchange 3000.

FIG. 4 shows a special selection signal (YY signal) according to an embodiment of the present invention.

The special selection signal 301 is composed of a call line change request signal 400 in the header section and the telephone number information 410 of the other party. The calling line request signal 400 is given by the originating exchange 2000 which has received the calling line change request signal 300. The other party's telephone number information 410 sets the telephone number of the other party who is making the call, but may be the same as the selection signal used conventionally.

Step 4) Special selection signal (YY signal) 3
The receiving side exchange 3000 that has received 01 is
Even if the receiver of the terminal having the telephone number indicated by the telephone number information 410 of the other party is set to 0, it is not judged as busy and the receiving terminal 4000 is connected.

FIG. 5 is a flow chart showing the operation of the telephone line change request signal originating side exchange according to the embodiment of the present invention.

That is, in the telephone line network to which the present invention is applied, the exchange (here, the call originator) that accommodates the terminal that has issued the call line change request signal (XX signal) when changing the call line in a call state. This shows the operation of the side switch 2000).

Step 500) A call is established between the calling terminal 1000 and the receiving terminal 4000.

Step 501) In the above call state, if an end signal is generated, the process proceeds to Step 502, and if no end signal is generated, Step 5 is executed.
Move to 03.

Step 502) If there is an end signal, the call is ended by the procedure similar to the conventional method.

Step 503) If the call end signal is not generated, it is judged whether or not the call line change request signal (XX signal) is received. If not, the process proceeds to step 500.

Step 504) Calling side exchange 2000
Receives the call line change request signal (XX signal),
Retrieve the telephone number of the other party stored in the main memory,
A special selection signal (YY signal) is generated by the XX signal.

Step 505) The line to be connected is selected from the lines other than the current telephone line, and the YY signal is sent to the receiving side exchange 3.
A connection request is made by the line newly selected to 000.
In the YY signal, the information of the call line change request is set in the header portion 400, so that the receiving side exchange 3000 does not judge that the receiving terminal 4000 is busy even if the receiver of the receiving terminal 4000 goes up (off-hook), and the new line is established. The line of the receiving terminal 4000 is connected. As a result, the calling terminal 1000 and the receiving terminal 4000 are brought into the call state again.

FIG. 6 is a flow chart showing the operation of the special signal receiving side exchange according to the embodiment of the present invention.

The operation of the terminating exchange 3000 is shown in FIG.

Step 600) The selection signal or the special selection signal is input from the originating exchange 2000 regardless of whether or not the call is established.

(Step 601) When the selection signal or the special selection signal is input, it is judged whether or not it is busy. If it is not busy, the routine proceeds to step 604.

Step 602) If busy,
It is determined whether or not there is communication line change request information (XX signal) in the header section 400 of the special selection signal, and if there is no XX signal, the process proceeds to step 603. If the XX signal is input, the process proceeds to step 604.

Step 603) The call termination procedure similar to the conventional method is performed.

Step 604) The line of the receiving terminal is selected according to the telephone number information of the special selection signal.

Step 605) The telephone call is established.

FIG. 7 shows the forms of old and new lines before and after the change of the telephone line according to the embodiment of the present invention.

In the figure, the line 710 connecting the transmitting terminal 1000 and the receiving terminal 4000 is the old line, and the line 72
0 indicates a new line.

The originating exchange 2000 is the originating terminal 1000.
It is determined whether or not the XX signal is input, and if it is input, the line terminals 700 and 701 are connected. This disconnects the line 710 of the line terminals 701 and 703,
The line 720 of the line terminals 702 and 704 is connected. New line 720 between originating switch 2000 and terminating switch 3000
Is connected, the terminating exchange 3000 determines whether the YY signal from the originating exchange 2000 is input,
If input, the line terminals 704-708-705 are connected. As a result, the calling terminal 1000 and the receiving terminal 4000 are in a call state. On the old line 710, the call termination procedure similar to the conventional method is performed by the originating side exchange 2000 and the receiving side exchange 3000.

[0057]

As described above, according to the call line change method of the present invention, the caller can perform a call line change request signal to the exchange only by performing an input operation from the telephone terminal while keeping the call state. There is no waste of making a call, changing the call line, lowering the handset (on-hook), disconnecting the call, and dialing again.

Further, since the charges before and after the change of the call line are not interrupted and are continuously performed, the call at a low charge is realized as compared with the case where the conventional method is applied.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the principle of the present invention.

FIG. 2 is a diagram showing an entire system according to an embodiment of the present invention.

FIG. 3 is a flowchart showing signal transmission / reception in a communication network to which the call line changing method according to the embodiment of the present invention is applied.

FIG. 4 is a diagram showing a special selection signal according to an embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the telephone line change request signal originating side exchange according to the embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the special signal receiving side exchange according to the embodiment of the present invention.

FIG. 7 is a diagram showing forms of old and new lines before and after a call line is changed according to an embodiment of the present invention.

FIG. 8 is a time chart showing signal transmission / reception in the conventional method.

[Explanation of symbols]

200, 201 Call end signal 202, 203 Disconnection signal 204 Recovery completion signal 205 Calling signal 206 Dial tone 207 Dial 208 Activation signal 209 Activation completion signal 210 Selection signal 211 Ringing signal 212 Ringing tone 213, 214 Response signal 300 Call line change request Signal (XX signal) 301 Special selection signal (YY signal) 400 Call line change request signal (header part) 410 Telephone number information of other party 700, 701, 702, 703, 704, 705 Line terminal 710 Old line 720 New line 1000 Calling Terminal 2000 Calling side exchange 3000 Calling side exchange 4000 Calling terminal

Claims (1)

[Claims] 1. A call line change request signal for changing to a new call line from a telephone terminal is transmitted from a telephone terminal to a subscriber exchange while maintaining the call state in the telephone line network. A method of changing a telephone line, wherein the subscriber exchange that receives the message changes the connection of the communication line.