KR100266791B1 - Method for recovering speegh path in a private branch exchange - Google Patents

Abstract

PURPOSE: A method for recovering a communication path in a PBX(Private Branch Exchange) is provided to move one physical line to another line code by using an ISDN(Integrated Services Digital Network) telephone terminal under a bad communication state. CONSTITUTION: A subscriber presses a suspend key while taking on a telephone by using one ISDN(Integrated Services Digital Network) telephone terminal, at a state that many ISDN telephone terminals are connected with parallel to a physical line which is connected to BRI(Basic Rate Interface)(16) of a PBX(Private Branch Exchange). After pressing the suspend key, when a code connected to the physical line is separated, a communication path is cut to be suspended. After connecting the separated code to another code of a different location, when a resume key is pressed, the suspended communication path is connected to resume communication.

Description

How to recover from a private exchange to a currency {METHOD FOR RECOVERING SPEEGH PATH IN A PRIVATE BRANCH EXCHANGE}

The present invention relates to a method for recovering an IDSN telephone terminal connected to a private exchange to a call after relocating from a call state, and in particular, using an ISDN terminal connected to a private exchange, again in a state in which a line code is separated for moving a position during a call. A method of recovering a channel after connecting a code.

In general, two ISDN telephone terminals connected to a private exchange are assigned two channels on one line, so that two ISDN telephone terminals can be used simultaneously in parallel when one ISDN telephone terminal is connected to one line.

1 is a diagram illustrating a message delivery structure in a general private exchange.

MPM (Main Processing Module) 10 is a central processing module. It consists of hardware peripheral devices, dedicated controllers and connections required for the exchange software to operate. MPM 10 functions include call processing, system configuration diagnosis, statistics, monitoring, signal processing, etc. to be. Signal processing sends and receives messages to subscriber processing module (LPM) 14 which monitors and processes subscriber lines of subscribers through link in dedicated signal processor (SPM) 12 and dual port memory which is internal common memory of CPM 10. SPM (Signal Processing Module) 12 is a dedicated signal processing unit that exchanges messages with LPM 14, which monitors and signals subscriber lines of subscribers through 512Kbps link, and shares them with MPM 10. The message is processed through memory and can be configured with the MOTOROLA M68302. The Line Processing Module (LPM) 14 is located in each subscriber shelf to investigate what events have occurred on each subscriber card, inform the SPM 12 via the signaling link, and process the messages received therefrom. It can be configured as INTEL 80816. Basic Rate Interface (BRI) 16 is connected to the LPM 14 and transmits the message received from the ISDN terminal to the LPM 14 for ISDN service, and transmits the message received from the LPM 14 to the ISDN terminal.

Conventional private exchanges that provide such ISDN services use multiple ISDN terminals connected in parallel on a single line. When the ISDN terminal is located in a busy state, the ISDN terminal is moved to connect another parallel line code. Was cut.

Accordingly, an object of the present invention is to recover the call path when the ISDN telephone terminal is moved by repositioning the ISDN telephone terminal by using a plurality of ISDN telephone terminals connected in parallel to one line in a private exchange. In providing.

The present invention for achieving the above object, the suspend key (Suspend) during a call using the one ISDN telephone terminal in a state in which a plurality of ISDN telephone terminals connected in parallel to the physical line connected to the BRI of the private exchange After pressing, when the ISDN telephone terminal disconnects the cord connected to the physical line, the telephone line is cut and paused. Then, the ISDN telephone terminal connects to the cord connected in parallel to the physical line installed in another place and resumes. When Resume) is pressed, the call is connected to a paused call and resumed.

1 is a diagram illustrating a message delivery structure in a general private exchange.

2 is a configuration diagram for connecting an ISDN telephone terminal in a private exchange according to an embodiment of the present invention;

3 is a block diagram of a physical layer processing module for a BRI according to an embodiment of the present invention

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

2 is a block diagram for connecting an ISDN telephone terminal in a private exchange according to an embodiment of the present invention.

Multiple ISDN telephone terminal subscribers are connected via BRI 16 of the private exchange, and currently 8 ISDN telephones can be connected to one physical line, and two ISDN telephones can be simultaneously called.

3 is a block diagram of a physical layer processing module for a BRI according to an embodiment of the present invention.

1 to 3 will be described in detail the operation of the preferred embodiment of the present invention.

In Figure 2, when the call condition is not good (noisy or when you want to make a secret call that no one else listens to) by calling the B-line subscriber ISDN telephone terminal from the A-line subscriber ISDN telephone terminal, the ISDN telephone terminal B1. If the subscriber presses the Suspend / Resume key and unplugs the line code of the ISDN telephone terminal B1, the call path is temporarily cut off. Then move the location and plug in the access code B2 or B7 or press the Suspend / Resume key using ISDN phone terminal B8 and press the Suspend / Resume key to call the ISDN terminal. The furnace is connected to allow re-call. In the BRI 16 operating as described above, the cord is disconnected from the busy state and the other ISDN telephone terminal connected in parallel or the ISDN telephone terminal with the cord unplugged into the installed code is moved to resume the call. Referring to FIG. 3, an operation of processing an operation for each layer is described with reference to FIG. 3. When a suspend / resume key is pressed from the ISDN telephone terminal B1, the BRI physical layer is sent from the BRI physical layer to the data link layer. The data link layer establishes a data link and sends suspend data to the network layer. At this time, the network layer processes the suspend data as an ISDN message and sends it to the application layer. The application layer converts the message so that the ISDN message is recognized by the main processor and sends the message to the main processor. At this time, the main processing unit sends a Suspend Ack signal to the application layer if suspend is possible, and sends a Suspend Reject signal to the application layer if suspend is not possible. The Suspend Reject signal is transmitted when both ISDN terminals B1 and B8 capable of simultaneous calls are used or one of the ISDN B1 and B8 performs the suspend function. The application layer receives the Suspend Ack signal and sends an NS-Suspend RQ signal to the network layer. The network layer receives the NS-Suspend RQ signal and sends the NS-Suspend Ack signal to the data link layer. The DL-DA-RQ signal is sent to the physical layer at the data link layer, and the Suspend Ack signal is sent to the ISDN telephone at the physical layer. Then, when the user unplugs the line code of ISDN telephone terminal B1 and plugs it into the line access code B2 and presses the Suspend / Resume key, the Resume key signal is applied to the main processing unit in the same manner as described above. In the main processing unit, the resume Ack signal is applied to the IASN telephone terminal B2 in the same manner as the above-described operation, and the call is resumed.

As described above, the present invention allows the user to move from one physical line to another line code during a call by using an ISDN telephone terminal so that the ISDN telephone terminal is moved to another line code when the call condition is not good. There is an advantage that you can connect and resume the call.

Claims (1)

In the method of recovering a call after moving an ISDN telephone terminal during a call when multiple ISDN telephone terminals are connected in parallel to one physical line connected to a private exchange, Pressing a suspend key during a call using one ISDN telephone terminal in a state in which a plurality of ISDN telephone terminals are connected in parallel to a physical line connected to the BRI of the private exchange; After pressing the pause key, disconnecting the one or more ISDN telephone terminals by disconnecting the code connected to the physical line; Pause the ISDN telephone in the call, connect to the cord connected in parallel to the physical line installed in another place, and press Resume to connect the paused call to resume the call. A method for recovering a currency in a private exchange, characterized in that made.

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