KR0177969B1 - Caller number receiving method in digital exchanging system - Google Patents

Abstract

The present invention increases the calling party request counter when outputting the calling party request signal and the ANI signal from the destination exchange to the calling exchange, and stores, decrypts, and analyzes the calling party information transmitted from the calling exchange, and if the reception fails, It outputs ANI signal to the exchange and requests retransmission of calling number information. If the reception is successful, it outputs calling number cancellation signal to the calling exchange and cuts the MF-GP channel path on the inter-transmission path and continuously processes the set call. By providing the calling party information receiving method of the telephone exchange, the overall call establishment success rate can be increased and the quality of communication service can be improved by not releasing the call being set while transmitting the calling party route.

Description

Sending call information of electronic switching center

1 is a diagram showing inter-station signals transmitted and received between destination exchanges of a conventional originating exchange.

2 is a flowchart showing a method of transmitting call number information of a conventional all-electronic switch.

3 is an internal configuration diagram of an electro-electric exchanger to which the present invention is applied.

4 is a diagram showing inter-station signals transmitted and received between an originating exchange and a destination exchange according to the present invention.

5 is a flowchart illustrating a method of transmitting call number information of an electronic switching system according to the present invention.

* Explanation of symbols for main parts of the drawings

1 call processing processor 2 inter-station signal interface device

3: MF-GP signal interface device 4: switch connection

The present invention relates to a method for transmitting caller information of an all-electronic switch, and more particularly, to an incoming switch that receives the caller information output from the originating exchange to the destination exchange by a multi-frequency gap packet (MF-GP) signaling method. It relates to a call information receiving method.

In general, all-electronic switching system converts analog signal, which is the voice of subscriber, into digital signal of PCM, multiplexes it, and performs exchange operation on the communication path composed of electronic switch, so that call is made between caller and called party.

While a call is made through the telephone exchange, the call exchanger connected to the calling party and the called exchanger connected to the called party can be classified into two types. When the calling subscriber information transmission request is made to the calling exchange by -GP signaling, the calling exchange transmits the calling party information corresponding to the called exchange.

That is, as shown in FIG. 1, while the call setup information is transmitted and received between the calling exchange and the called exchange, the called exchange outputs the calling request signal to the calling exchange, thereby requesting subscriber information transmission. Upon outputting the Automatic Number Identification signal, the originating exchange outputs a start signal, a call grade signal, a plurality of call number signals and all call number lights.

In this case, when the called exchange fails to receive the calling number information transmitted as described above, the calling exchange outputs a call cancel signal to the calling exchange, releases the call currently being set, and then outputs a relay line recovery signal to the calling exchange and the called exchange. Allow the relay to recover in between.

The method for receiving call number information of an electronic switching system having a signal between stations as described above includes: selecting, by a destination exchange, an MF-GP channel and connecting a passage of a transmission path between stations as shown in the flowchart of FIG. 2; Outputting a calling request signal to the calling exchange; Outputting an ANI signal to the originating exchange; Receiving outgoing call information transmitted from the calling exchange; And storing the calling party number information.

Outputting a calling party cancellation signal to the calling exchange after receiving all calling party information; Decrypting and analyzing the received calling party information; Detecting whether reception of the calling party number information is successful; If the reception fails, cutting the MF-GP channel path on the inter-station transmission path and outputting a relay line recovery signal to return the call; And if the reception is successful, cutting the MF-GP channel path on the inter-station transmission path and continuing processing for ongoing call setup.

Here, the call number information is composed of a start signal, a call grade signal, and a plurality of call number signals, and the above-mentioned signals are transmitted for the same time without a gap between signals.

However, as described above, in the prior art, the originating exchange transmits the calling party information to the destination exchange, and when the destination exchange fails to receive the calling party information, the destination exchange outputs the calling party cancellation signal to the calling exchange. Since the call setting is released, the call setup fails and the overall call setup success rate is deteriorated.

Accordingly, the present invention has been made to solve the above-described problems of the prior art, and if the receiving exchange fails to receive the calling party information transmitted from the calling exchange, repeatedly outputs an ANI signal requesting retransmission of the calling party information. The purpose of the present invention is to provide a method for receiving source number information of an electronic switchgear to reread and analyze the source number information transmitted thereafter.

The present invention to achieve the above object,

Selecting a GF-MP channel at the destination exchange, connecting a passage between stations, and outputting a call request signal to the originating exchange; Outputting an ANI signal to the originating exchange and incrementing the originating request request counter;

A third step of storing, decrypting and analyzing the calling party information transmitted from the calling exchange;

A fourth step of detecting whether a retransmission request is possible by examining a call number request counter in case of a reception failure;

A fifth step of proceeding to the second step if a retransmission request is possible; And

If the reception is successful, the sixth step of outputting the originating call cancellation signal to the originating exchange and cutting the MF-GP channel path on the inter-station transmission line and continuously processing the set call.

Hereinafter, with reference to the accompanying drawings in more detail set as an embodiment of the present invention.

3 is a block diagram showing the internal configuration of the electronic switching system applied to the present invention, wherein the call processing processor 1 is in charge of the overall control of one call processing and at the same time the inter-station signal through the inter-station signal interface device 2; Control, analyze and process the received inter-station signal, and control transmission and reception of the MF-GP signal through the MF-GP signal interface device (3).

In addition, the switch connecting portion 4 is used as a switch for connecting the calling subscriber and the communication path of the incoming exchange period and the passage for transmitting and receiving the MF-GP signal.

Here, the MF-GP signal interface device 3 is composed of a plurality of MF-GP channels while generating MF-GP information resources, and the inter-station signal interface device 2 is an inter-station signal to the destination exchange. It is in charge of sending and receiving to control the transmission path between PCM stations.

In addition, the call processing processor 1 is to provide a method for receiving the calling party information of the electronic switch according to the present invention, which will be described in detail with reference to FIGS. 4 and 5 as follows.

4 shows signals between stations transmitted and received between an originating exchange and a destination exchange. The call origination request signal from the destination exchange is described while the call setup information is transmitted and received between the originating exchange and the destination exchange. When an ANI signal is received after being received by the originating exchange, the originating exchange transmits originating number information consisting of a start signal, an originating class signal, and a plurality of originating number signals to the destination exchange.

If the destination exchange fails to receive the source number information, the ANI signal is outputted to the source exchange again. When the ANI signal is received by the source exchange, the source exchange retransmits the source number information to the destination exchange. Done.

If the destination exchange succeeds in receiving the calling party information, the calling party cancel signal is outputted to the calling exchange. After the calling party canceling signal is received by the calling exchange, call setting information between the calling exchange and the called exchange is received. It is sent and received to complete call setup.

An electronic switch having a station-to-station signal as described above, and a caller ID information receiving method, include: selecting an MF-GP channel at a destination exchange, as shown in the flowchart of FIG. 5, and connecting a passage between stations; Outputting a calling request signal to the calling exchange; And an ANI signal output step of outputting an ANI signal to the originating exchange.

Incidentally, incrementing the calling number request counter; Receiving source number information from the source exchange; Storing the calling number information; Receiving all necessary calling number information; Decoding and analyzing the received calling party information; And a reception success detection step of detecting whether the reception is successful.

In addition, if the reception failure in the reception success detection step of examining the call number request counter; Detecting whether a retransmission request of the calling party information is possible; Proceeding to outputting the ANI signal if a retransmission request is possible; Outputting an originating call cancellation signal to an originating exchange if a retransmission request is not possible; And cutting the MF-GP channel path on the inter-station transmission path and outputting a relay line recovery signal to return the call.

The method may further include: outputting an originating call cancel signal to an originating exchange if the reception is successful in the reception success detection step; After the MF-GP channel path is cut on the inter-station transmission path, a process for continuing call setup is performed.

That is, the present invention described above enables retransmission of multiple calling party information when there is a reception failure of the destination exchange, thereby preventing call establishment failure due to transmission of calling party information during call setup.

As described above, the present invention increases the calling party request counter when outputting the calling party request signal and the ANI signal from the destination exchange to the calling exchange, and fails after saving, decrypting, and analyzing the calling party information transmitted from the calling exchange. If it is, the ANI signal is output to the calling exchange to request retransmission of the calling information. If the reception is successful, the calling signal is output to the calling exchange and the MF-GP channel path is cut on the transmission path between stations. By providing the calling party information receiving method of all electronic switch which is processed by the system, it is effective to improve the quality of communication service while increasing the overall call establishment success rate by not releasing the call that is being set during the sending of the calling party information. .

Claims (1)

Selecting a GF-MP channel at the destination exchange, connecting a passage between stations, and outputting a call request signal to the originating exchange; Outputting an ANI signal to the originating exchange and incrementing the originating request request counter; A third step of storing, decrypting and analyzing the calling party information transmitted from the calling exchange; A fourth step of detecting whether a retransmission request is possible by examining a call number request counter in case of a reception failure; A fifth step of proceeding to the second step if a retransmission request is possible; And a sixth step of outputting an originating call cancel signal to the originating exchange if the reception is successful, and cutting the MF-GP channel path on the inter-station transmission line and continuously processing the set call. How to receive call number information.