KR100270737B1 - Management method of incomming voice call in isdn exchange system - Google Patents

Abstract

PURPOSE: A method for processing a received voice call in an ISDN(Integrated Services Digital Network) is provided to consider a time difference of responding messages transmitted from each terminals, and to process received calls after confirming whether the responding message are received from other voice terminals. Therefore, it is possible to prevent a call disconnection. CONSTITUTION: An exchange(100) simultaneously transmits setup messages to data terminals or voice terminals which are connected with a port when a call is received to the port. If call release messages are received from the data terminals, the exchange(100) checks whether a call processing request message is received from an other terminal during a determined time. If the call processing request message is received, the exchange(100) processes the received call in respond to the other terminal. If the call processing request message is not received, the exchange(100) releases the received call.

Description

MANAGEMENT METHOD OF INCOMMING VOICE CALL IN ISDN EXCHANGE SYSTEM}

The present invention relates to a method for processing an incoming call of an integrated telecommunications network switch, and more particularly, to a method for processing a call that is simultaneously received by multiple terminals connected to a port.

In general, Integrated Services Digital Network (hereinafter referred to as ISDN) is a comprehensive digital communication network that provides not only voice communication but also non-voice services such as video and data. A facility that can efficiently transfer, accumulate, and process information.

In the conventional ISDN exchange, when a voice call is received to the port while several ISDN terminals are connected to one port, a setup message is transmitted to the terminals connected to the port. At this time, since the data dedicated terminal connected to the port cannot process voice call, it transmits a RELEASE_COMPLETE message requesting the release of the incoming call in response to the transmitted setup message. On the other hand, other voice terminals are capable of voice call processing and thus transmit an ALERTING message in response to the transmitted setup message.

However, since the data-only terminal and the voice terminals are connected to one port, the data release terminal first transmits a call release message in response to the voice call. In this case, the ISDN exchange releases the incoming voice call in response to the call release request message sent from the data-only terminal.

As described above, in the conventional ISDN exchange, when a voice call is simultaneously received by multiple terminals connected to one port, the data-only terminal among the multiple terminals transmits a release message of the received call in response to the incoming voice call first, so that there is another voice terminal. Even if a voice call is released, an error occurs.

Accordingly, an object of the present invention is to provide a method for preventing a call from being disconnected due to the disparity of a response message transmitted from each terminal when the ISDN exchange is simultaneously called to several terminals connected to one port.

Another object of the present invention is to provide a method for processing a call according to a response message transmitted from a voice terminal instead of a data terminal when a voice call is simultaneously received from multiple terminals connected to one port in an ISDN exchange.

Another object of the present invention is to provide a method for processing a call in response to a response message transmitted from a voice terminal when a voice call is simultaneously received from a ISDN exchange to a data terminal and a voice terminal connected to one port.

A method for processing an incoming voice call in an integrated telecommunications network switch in which a plurality of data terminals and voice terminals are connected to one port for achieving the above objects is provided. Transmitting a setup message to each of the data terminals and voice terminals simultaneously; and if a call release message is received from a predetermined data terminal after the setup message is transmitted, a message requesting a call progress from another terminal is transmitted for a predetermined time. Checking whether it is received; processing a call received corresponding to the other terminal when a message requesting a call progress is received from another terminal within the predetermined time; and receiving the call from the other terminal within the predetermined time. No message is received requesting call progress Surface characterized in that it comprises the step of releasing the incoming call.

1 is a view showing a structure in which several terminals are connected to one port in an integrated information communication network switch.

2 is a diagram illustrating a process of processing an incoming call according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

FIG. 1 illustrates a case where several terminals are connected to one port in an ISDN exchange to which the present invention is applied (point-to-multipoint). The ISDN switch 100 according to the present invention connects subscriber terminals 11 to 14 of multiple data terminals or voice terminals to one port through the BRI-S interface 110.

2 illustrates a process of processing a call that is received by a plurality of subscriber stations connected to one port in an ISDN exchange according to an embodiment of the present invention.

1 and 2, a method for processing a call received by several subscriber stations connected to one port in an ISDN exchange according to an embodiment of the present invention will be described. The exchange 100 stores programs and data for performing a control process as shown in FIG. 2 in an internal memory (not shown in the figure). In addition, the switch 100 according to the present invention includes an internal timer for checking whether a call progress request message is transmitted within a predetermined time after receiving the call release message.

1 and 2, in operation 210, the switch 100 determines whether a predetermined call is received from a trunk line or an extension.

If it is determined that the call is received in step 210, the switch 100 transmits a setup message to the subscriber station corresponding to the received call through the BRI-S interface 110 in step 220.

In operation 230, the switch 100 determines whether a call release message (eg, a RELEASE COMPLETE) is transmitted from the subscriber stations 11 to 14 through which the setup message is transmitted through the BRI-S interface 110.

If it is determined in step 230 that the call release message is transmitted from the data terminal 11, in step 240, the exchange 100 drives an internal timer.

In contrast, after the call release message is not transmitted in operation 230 or the timer is driven in operation 240, the switch 100 requests call progress from subscriber stations 11 to 14 through the BRI-S interface 110 in operation 250. For example, it is determined whether the ALETRING) message is transmitted. That is, in operation 250, the switch 100 determines whether a call progress request message is transmitted from the voice terminals 12 to 14 except for the data terminal 11 that transmits the call release message in response to the transmitted setup message.

If it is determined in step 250 that the call progress request message is not transmitted from a predetermined terminal among the voice terminals 12 to 14, in step 260, the switch 100 determines whether the time set by the driven timer has elapsed.

If it is determined in step 260 that the time set by the timer has passed, the exchange 100 releases the incoming call in step 270.

On the contrary, if the time set by the timer has not elapsed in step 260, the switch 100 repeatedly performs the control operation from step 250.

On the other hand, if a message for requesting call progress is transmitted from voice terminals 12 to 14 other than the data terminal 11 which transmitted the call release message in step 250 within the time set by the timer, the exchange 100 determines in step 280 the timer of the timer. Stop the drive.

As the call progress request message is transmitted from another voice terminal within the time designated by the timer, the exchange 100 performs a procedure for the incoming call in response to the call progress request message transmitted through the BRI-S interface 110 in step 290. Continue.

In the ISDN exchange according to the embodiment of the present invention, a process of processing a voice call simultaneously received by multiple data terminals and voice terminals connected to one port is as follows.

When a voice call is received by several ISDN terminals connected to one port of a BRI-S interface card in the ISDN switch according to the present invention, the BRI-S transmits a setup message to all connected terminals, respectively. At this time, the data-only terminal among the ISDN terminals connected to the port cannot transmit a voice call and transmits a message requesting call release. Then, the BRI-S interface card does not immediately release the incoming voice call in response to the message for requesting the release of the call. Instead, the BRI-S interface card drives a timer to perform call progress from a voice terminal other than the data-only terminal for a predetermined time. Determine whether the request message is sent. If there is no response message from the other terminal for a certain time during which the timer is running, the ISDN exchange releases the incoming call. On the contrary, if there is a response to a call received from another voice terminal within a predetermined time period during which the timer is driven, the ISDN exchange performs a call processing procedure accordingly.

As described above, the present invention can prevent an error in which a call, which is received by several terminals connected to one port in an ISDN exchange, fails to proceed due to the disparity of a response message and is cut off. In addition, according to the present invention, if a data terminal and a voice terminal are simultaneously connected to one port in an ISDN exchange, the voice terminal can continue the call processing procedure even if there is a call release request from the data terminal.

Claims (4)

Claims [1] A method for processing an incoming voice call in an integrated telecommunication network switch where a plurality of data terminals and voice terminals are connected to one port. Transmitting a setup message simultaneously to each of the plurality of data terminals and voice terminals connected to the port when a call is received to the port; If a call release message is received from a predetermined data terminal after transmitting the setup message, checking whether a message requesting call progress is received from another terminal for a predetermined time; Processing the incoming call corresponding to the other terminal when a message requesting the call progress is received from the other terminal within the predetermined time; And if the message for requesting the call progress is not received from the other terminal within the predetermined time period, releasing the incoming call. Claims [1] A method for processing an incoming voice call at an ISDN exchange having multiple data terminals and voice terminals connected to one port. Transmitting a call setup request message to each of the plurality of data terminals and voice terminals when a call is received; Determining whether a call release request message is received from a predetermined data terminal in response to the call establishment request message; Determining whether a call progress request message is received from a predetermined voice terminal in response to the call setup request message within a set time when the call release request message is received; And when the call progress request message is received within the set time, processing the incoming call corresponding to the predetermined voice terminal. The method of claim 2, And if the call progress request message is not received within the set time, releasing the incoming call. The method of claim 2, And a predetermined timer is driven when the call release request message is received, and the timer is stopped when the call progress request message is received within a set time.