KR950010482B1 - Subscriber number control method - Google Patents

Abstract

checking whether an output line is occupied or not; transferring a subscriber number received from the output line to a subscriber switch; waiting a signal from the subscriber switch; waiting a subscriber state signal; waiting the subscriber state signal by performing the number which is not processed; informing that a subscriber reception is completed by a normal singal; and processing an additional reception operation.

Description

Relay control method of calling party number in telephone exchange

1 is a schematic structural diagram of an all-electronic exchanger which is a distributed control system.

2 is a block diagram when the electronic exchange acts as a relay exchange where R2 and TUP interlock.

3 is a control flowchart for relaying an outgoing subscriber number at a relay exchange.

The present invention controls the relaying of an outgoing subscriber number when an R2 signaling system implemented as an inter-station signaling method and a NO.7 signaling telephone user unit (TUP) interworking in an all-electronic exchange that performs a relay exchange function. It is about how to.

Until now, the domestic telephone network has used R2 signaling as the inter-station signaling method. However, in response to the new and diverse service demands of subscribers, the No.7 signaling method with excellent signal capacity and reliability has been introduced as a new inter-station signaling method. As a result, the interworking between the R2 signaling system and the No. 7 signaling system, which is the existing inter-station signaling method, needs to be interworked with the telephone user unit.

Accordingly, an object of the present invention is to originate from an incoming exchange when an R2 signaling system and a No.7 signaling telephone user unit (TUP) implemented as inter-station signaling in an all-electronic exchange that performs a relay exchange function are interworked. When the subscriber number is requested to be relayed, the receiving exchanger does not fail the call by controlling the signal between the calling party and the station according to the receiving subscriber number system (open type and fixed type) and when the relay of the calling party number is requested. The present invention provides a method for relaying an outgoing subscriber number.

In order to achieve the above object, the present invention, if the relay exchange interworking between the R2 signaling system and the No.7 signaling telephone user unit (TUP) is requested to relay the originating subscriber number from the destination exchange, it can be first received. Investigate the calling party's numbering system (open and fixed, and, if the numbering system is open, examines the state of inter-station signaling with the originating exchange. In this state, the next signal cannot be transmitted until the corresponding signal is received from the calling exchange according to the characteristics of the R2 signaling method, so that it is not possible to request the relaying of the calling party number to the calling exchange in this case. The call is not accepted to prevent the call from failing.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a schematic control structure diagram of an all-electronic exchanger which is a distributed control system.

As shown in the figure, the electronic switch is composed of three sub-systems, ie, an Access Swithching Subsystem (ASS), an Interconnection Network Subsystem (INS), and a Central Control Subsysem (CCS).

Ass is classified into Ass_s (Subscriber), ASS_T (Trunk), and ASS_7 (No. 7 Signaling System) according to the function.In ASS_S, the call processing function for subscribers accommodated in the exchange is defined by the Access Switching Processor (ASP), ASS_T In the case of ASS_7, ASP is used for inter-station circuit call processing, and in ASS_7, the function of No.7 signaling transfer part (MTP) and signaling connection control part (SCCP) is used for ASP and SMHP (Signaling Message). Handing Processor).

In INS, number translation processor, route control function, and space division switch control function are performed by NTP (interconnect Netwrlk Processor) and CCP respectively. The function is performed.

Each subsystem is connected to the INS via LDL (Local Date Link) to form a system internal communication network between processors.

2 is a configuration diagram when the electronic switchboard acts as a relay exchange where interworking between the R2 signaling system and the No.7 signaling telephone user unit (TUP) occurs.

The relay exchange converts the R2 signal received from the originating exchange into a TUP signal and transmits it to the terminating interrogator, and converts the received TUP signal from the terminating exchange into an R2 signal and transmits it to the originating exchange.

The number system in which the number of called subscriber numbers that can be received by the relay exchange is fixed is called fixed, and the number system that is not fixed is called open.

3 is a control flowchart for relaying an outgoing subscriber number in a conventional exchange.

The relay exchange receiving the incoming line occupancy request from the originating exchange connects the R2 signaling equipment to the incoming line and sets the state of the call to the called subscriber number (hereinafter referred to as called number) for the station number translation. Wait once

If one incoming call number is received (1), it is checked whether the station number can be translated by the received called number (2), and if the station number cannot be translated, the calling party is further requested by the calling exchange (3).

If the station number can be translated, the station number is analyzed (4) .If the station number is determined to be a transit call of another station with the TUP signal, it is examined whether the outbound line can be occupied by the incoming number received so far. (5).

If the outgoing line cannot be occupied, the calling party is requested to the calling exchange further (6), and the call state from the calling exchange is waited for with the incoming state for receiving the relay line.

If one more incoming call number is received (7), it is checked whether the outgoing line can be occupied by the incoming call so far (8), and if the outgoing line cannot be occupied, the calling exchange is further requested by the calling exchange (9). Waits for the called party from the originating exchange.

If the incoming call number is received enough to occupy the outgoing line, the incoming call line is occupied (10), and the incoming call number received so far is transmitted to the called exchange (11).

Compared to the maximum number of incoming calls that can be received at the relay exchange (represented by Max in the drawing) so far (12), the calling exchange is requested more by the originating exchange only when the maximum number is not received. (13), the state of the call is set to the signal interworking state, and the signal is waited for from the destination exchange.

When the called party is received in the signal interworking state (14), the called party is transmitted to the calling exchange (15), and it is examined whether to request the calling subscriber number (hereinafter referred to as calling number) to the calling exchange (16).

If there is no caller ID request, it checks whether the called party is a signal for indicating the termination of the called party (indicated by EOD in the drawing) (17). If it is a termination signal, it waits for a signal from the destination exchange. The number of called numbers is compared with the maximum number of called numbers that can be received at the relay exchange (18). If the maximum number is not received, the calling party requests the called party more (19), and then waits for a signal from the originating and terminating exchange, and if the maximum number is received, waits for the signal from the called exchange.

If there is a call request, the calling exchange class first requests the calling subscriber class according to the R2 signaling method to receive the calling call (20), and makes the call status to the calling call receiving state and waits for the calling subscriber status signal.

When a call origination request is received from the called exchange (21), the maximum and minimum number of incoming calls that can be received by the relay exchange (represented by Min in the drawing) are compared (22) to determine whether the numbering system is open or fixed.

If the maximum number and the minimum number of incoming calls are the same fixed number system, compare the number of incoming calls so far with the maximum number of incoming calls (23) and call the calling number if it is still receiving the called number. If all the registration is received, first, the calling party is requested according to the R signaling method in order to receive the calling number, and the state of the number (25) is made into the calling party receiving state and waits for the calling subscriber status signal.

In the case of an open number system with different maximum and minimum number of called party that can be received, the number of called party is compared with the maximum and minimum number of the called party that can be received so far (26). If it is determined that the reception has been received, it is checked whether the incoming call termination signal is received (27).

When the called party termination signal is received, the calling party class is first requested in accordance with the R2 signaling method to receive the calling party (28), and the call state is made to the calling party receiving state and waits for the calling party status signal. If the incoming call termination signal is not received, the incoming call is received and the calling party is requested by the calling exchange. Therefore, according to the characteristics of the R2 signaling method, the next signal cannot be transmitted until a corresponding signal is received from the calling exchange. The originating exchange cannot make a relay request for the originating call. In this case, the incoming exchange is informed that the relay request of the calling number cannot be accepted, thereby preventing the call from failing.

If it is not possible to determine that the called party has been received enough to determine the called party, if the receiving party is still receiving the calling party, register the calling party request so that the calling party can be relayed after receiving the called party (24). If the number of incoming calls that can be received at the exchange can be received, the calling exchange can be requested by the calling exchange, so the calling subscriber class is first requested according to the R2 signaling method (25), and the call status is made by the calling party receiving state. Wait for status signal.

Upon receipt of the called party reception completion signal from the called exchange (38), the relay exchange checks (39) whether it is requesting the called party to the calling exchange and determines the type of called party reception completion signal to be sent. If the incoming call is requested, a signal in the form of a pulse (40). If the incoming call is not requested, a normal signal (41) indicates that the incoming call has been received, and the R2 signal equipment connected to the incoming line is restored to recover the incoming call. Terminate the R2 register signal.

When the calling party class is received in the calling party receiving state (30), the calling party sends a calling request signal to the calling exchange in order to receive the calling party (31).

If one call number is received (32), it is checked whether the call number end signal is received (33). If the received signal is not the calling party end signal, the calling party sends the calling party request signal to the calling exchange and waits for the calling party (34).

If the received signal is the calling number ending signal, the calling number received so far is transmitted to the called exchange (35), and it is checked whether or not the called number is necessary (36). If it is necessary to receive the called party more, transmit the called party request signal to the calling exchange, and then change the call status to the signal interworking state and wait for the called party (37). Change to interlocking state.

Therefore, the present invention carried out by the above processing procedure in the case of relaying the subscriber number from the relay exchange where R2 and TUP interworking occurs to the destination exchange in the form of the network number system and the time of the relay request of the calling subscriber number Accordingly, if the inter-station signal is processed by controlling the R2 signal between the originating exchange and the relay exchange, there is an effect to prevent the failure of a call that may occur when controlling the relaying of the originating subscriber number when the network numbering scheme is open. .

In addition, the present invention can be applied as a method of relaying an outgoing subscriber number in a relay exchange in which a signaling scheme different from the R2 signaling scheme is linked or the R2 signaling scheme is linked in a link-by-link form. .

Claims (1)

In the method of controlling the relaying of outgoing subscriber number when the R2 signaling system and the No.7 signaling telephone user unit (TUP) implemented as inter-station signaling method in the all-electronic switching system which performs the relay exchange function. When receiving one incoming call number, translate the station number to the received incoming call number, and if it is determined that the station number translation result is a transit call of another station with the TUP signal, the outgoing call will be occupied by the incoming call number received so far. After performing the first step (1 to 5) and the first step (1 to 1) to check whether the outgoing relay line cannot be occupied, the calling exchange may be requested to the calling exchange so that it can occupy the outgoing relay line. A second step (6 to 11) of receiving the incoming call number so as to occupy the outgoing line and transmitting the received call number to the destination exchange by occupying the outgoing line; and the second step (6 to 11). After execution, compare the number of incoming calls received so far with the maximum number of incoming calls that can be received by the relay exchange, and request only the called party to the originating exchange only if the maximum number is not received, and signal the status of the call. After the third step (12, 13) waiting for a signal from the destination exchange in the interlocking state and the third step (12, 13), after receiving the incoming call in the signal interlocking state, the incoming call is sent to the calling exchange and then Investigate whether to request an outgoing subscriber number (hereinafter referred to as calling number) to the exchange, and if there is no calling number request, resolve incoming call ending signal, solve the number of called party number, wait for signal from the called exchange, and if there is a calling number request Requesting the calling party class to receive the call and waiting for the calling party status signal (steps 14 to 20), and after performing the third steps (12, 13), When the calling party request is received from the exchange, the number of incoming and outgoing calls that can be received from the relay exchange is compared (Min in the figure), and the processing according to the numbering system, received at the calling party end signal, and the number as the destination subscriber decision variables. After the fifth step (21 to 29) and the third step (12, 13) to perform the process according to the incoming call not received as much as the incoming call state, and receives the incoming call reception completion signal from the destination exchange In step 6, the relay exchange determines whether the incoming call is requested by the calling exchange. If the incoming call is requested, the relay exchange signals that the incoming call is completed. 41), and when the calling party class is received in the calling party receiving state, the calling party waits for the calling party. If it is not the end signal, it sends the calling number request signal to the calling exchange and waits for the calling number. If it is the ending signal, it transmits the calling number received so far to the destination exchange, And a seventh step (30 to 37) to carry out the process.