KR19980083757A - Charging Method for Extension of Toll Free Call in Private Exchange - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

A billing method for extension calls of toll free calls in private exchanges.

I. The technical problem to be solved by the invention

In case of receiving the call at the toll free, the termination of the call shall be notified to the local exchange when all the calls of the telephone extension are completed.

All. Summary of Solution of the Invention

In the private exchange, the billing method for the extension call of the toll free call, the process of performing the call according to the toll free call, the process of switching the incoming call to another extension, and the call to the local exchange when the call based on the incoming call is completed This is done by notifying the termination.

la. Important uses of the invention

It is used for charging method of exchange.

Description

Charging Method for Extension of Toll Free Call in Private Exchange

The present invention relates to a billing method for extension of a toll-free call in a private exchange, and more particularly, to a method of preventing a settlement due to a missing fee in a local exchange during extension of a private exchange.

In a conventional private exchange, when a telephone is received by a collect call, the telephone exchange receives the call from a corresponding telephone number and converts the call to another extension.

That is, as described above, the conventional private exchange causes a problem that call charges in the converted extension may be omitted if the call continues after the extension of the extension.

Accordingly, an object of the present invention is to provide a method of preventing a drop of a fee when an extension of a toll free call is made in a private exchange.

The billing method for extension of the toll free call in a private exchange to achieve the above object comprises the steps of: performing a call according to the toll free call; converting the incoming call to a different extension; When the call is completed, it is characterized by the process of notifying the end of the call to the national exchange.

1 is a block diagram of an exchanger according to the present invention;

2 is an operation flowchart according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating a configuration of a private exchange, in which the control unit 111 controls the overall operation of the exchange to control call switching and provide various services to a user. The ROM 112 stores a program of the control unit 111 and initial service data for performing basic calls and various functions. The RAM 113 temporarily stores data generated while the controller 111 executes a program. The switching circuit 114 switches various signals under the control of the control unit 111. The subscriber circuit 115 supplies a call current to the subscriber telephone under the control of the controller 111 and simultaneously interfaces a signal between the subscriber telephone and the switching circuit 114. The ring generator 116 generates a ring signal and supplies it to the subscriber circuit 115. The trunk line circuit 117 forms a trunk line call loop under the control of the control unit 111 to form a trunk line CO, and interfaces a signal between the trunk line CO and the switching circuit 114. Here, CO line CO refers to a line connecting the CO line circuit 117 and a national exchange (not shown). The tone generator 118 generates various tone signals under the control of the controller 111 and outputs them to the switching circuit 114. A dual tone multi frequency (DTMF) receiver 119 analyzes the DTMF signal input from the switching circuit 114, converts the signal into digital data, and outputs the digital data to the controller 111. Here, the DTMF signal input to the DTMF receiver 119 by the switching circuit 114 is a telephone number generated by the trunk line subscriber or a telephone number generated by the extension subscriber. The DTMF transmitter 120 converts the digital data output from the control unit 111 into a DTMF signal and outputs the DTMF signal to the switching circuit 114. Here, the DTMF signal output from the DTMF transmitter 120 becomes the telephone number of the trunk line subscriber generated when the station side calls the trunk line side.

2 is a flowchart illustrating an operation for preventing a drop of a fee during extension switching according to the present invention.

First, in step 211, the control unit 111 of the private exchange forms a call path with the 1111 corresponding to the extension number A desired by the caller who is an external subscriber connected through the CO line 117. Here, the caller calls the extension number 1111 toll free. In step 213, the control unit 111 performs a call between the caller and the extension number 1111.

In step 215, the controller 111 checks whether the subscriber of the extension number 1111 switches a call to another extension number. In this case, if the call is switched to another extension number, the controller 111 proceeds to step 217. If the call is not switched to another extension number, the controller 111 proceeds to step 227 to check whether the call is terminated.

At this time, if the end of the call is detected, the control unit 111 proceeds to step 225, and if the end of the call is not detected, the control unit 111 proceeds to the step 213 to continue the call.

The controller 111 proceeds to step 217 and ends the call with the extension number 1111, and proceeds to step 219 to form a call path with 2222 corresponding to another extension number B. In operation 221, the controller 111 performs a call between the caller and the other extension number 2222.

The controller 111 detects the end of the call in step 223. At this time, if the end of the call is detected, the control unit 111 proceeds to step 225. If the end of the call is not detected, the control unit 111 proceeds to step 221 to continue the call.

In step 227 or step 223, the end of the call is detected and the control unit 111, which proceeds to step 225, notifies the local exchange that the call corresponding to the callee's burden has ended. In other words, the local exchange receives the end of the call and at the same time performs the billing.

As described above, the present invention can prevent the call charges from the other extension from being lost when the call is transferred from the corresponding number to the other extension when the call is received at the toll free.

That is, the private exchange system according to the present invention notifies the local exchange of the termination of the call only when the converted extension is completed, so that the local exchange performs payment when the toll free telephone is completely completed.

Claims (2)

In the billing method for extension of toll free call in private exchange, The method of billing when the extension of the toll free call in the private exchange, characterized in that the end of the call for the toll free call to the local exchange when the call according to the toll free call is terminated. In the billing method for extension of toll free call in private exchange, Making a call based on a toll free call; Converting the incoming call to another extension; Billing method when the extension of the toll free call in the private exchange, characterized in that the completion of the call according to the incoming call is a process of notifying the end of the call to the local exchange.