KR100689389B1 - V5.2 protocol convertor - Google Patents

Abstract

The present invention provides a V5.2 protocol converter for providing a V5.2 LE matching function between an AN and a switching network that does not support the V5.2 LE matching function, wherein at least one of an analog trunk, an ISDN BRI, and a digital trunk is provided. A physical interface that detects signals related to call start, progress, and termination from the switching network to enable service with the AN; a digital trunk interface as an interface for matching with the AN; and a detected interface from the interface. The signal is controlled by the V5.2 LE protocol control function according to the internal control call processing procedure and has a control unit that performs a matching operation with the AN.

AN, LE, V5.2, Protocol Conversion

Description

V5.2 protocol converter {V5.2 PROTOCOL CONVERTOR}             

1 is a diagram illustrating a general access network and a switched network connection;

2 to 5 are diagrams illustrating an access network and a switching network connection state in which a V5.2 protocol conversion apparatus according to an embodiment of the present invention is configured.

The present invention relates to a V5.2 protocol conversion device connected between a subscriber network matching device called an access network (AN) and a general switch to enable a service.

1 is a diagram illustrating a general access network and a switched network connection state. Referring to FIG. 1, in order to service an ordinary subscriber or an ISDN subscriber 400 by connecting an access network 300 to a switching network, a V5.2 LE ( Local Exchange) protocol must be applied. The protocol is divided into an AN part and a local exchange (LE) part. The AN must be connected to the LE to operate, and one LE can match multiple ANs.

Since the AN system has recently been serviced by network providers, the AN device can be serviced only in an area where an exchange supporting the V5.2 protocol is installed. However, if it wants to match the general exchange, it should be changed to have the V5.2 LE protocol function. The AN device could not be serviced if the exchange could not have this capability.

Accordingly, an object of the present invention is to provide a variety of AN and matching functions between a public network without an V5.2 LE function and an access network.

In order to achieve the above object, the V5.2 protocol converting apparatus of the present invention matches the AN with the V5.2 LE protocol and implements the matching function. ), ISDN BRI subscriber, digital trunk (E1, ISDN PRI) interface. In addition, R1 and R2 register signal processing, decimal signal processing (decadic), and dual tone multi-frequency (DTMF) signal processing are performed for signal matching of the digital trunk.

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

2 to 5 are diagrams illustrating an access network and a switching network connection state in which a V5.2 protocol conversion apparatus according to an embodiment of the present invention is configured. First, referring to FIG. 5, in order to match the access network 300 using the P5.2 (Public Switched Telephone Network) network without the V5.2 LE matching function and the protocol conversion device 250 according to the present invention, The physical interface of the converter 250 according to the present invention includes an analog trunk, an Integrated Services Digital Network (ISDN), a basic rate interface (BRI), and a digital trunk. Or the like.

In this case, the interface detects signals related to call start, progress, and termination from the PSTN 150 to enable service with the matched AN 300. The interface for registration with the access network 250 is a digital trunk interface. Analog trunk matching is connected to the general subscriber on the PSTN 150 side and the trunk can control the loop of the subscriber line and detect the incoming ring signal, the line polarity signal, and the public telephone billing signal.

The ISDN BRI registration is connected to the U-interface with the ISDN BRI on the PSTN 150 side. BRI operates as a network terminal (NT) function and satisfies the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) Q.921 and Q.931 standards.

Digital trunks have the same functionality as general trunks that physically meet G.703 and G.704 of the ITU-T. However, the internal operation is different depending on the matching control element. That is, it operates as an ISDN Primary Rate Interface (PRI) or a general relay line according to the matching function of the PSTN 150 side. At this time, the accompanying signal processing satisfies the general standard.

The detected signal from this PSTN interface performs a V5.2 LE protocol control function according to an internal control call processing procedure and may match with the access network 300. This V5.2 LE protocol control part satisfies ITU-T G.964, G.965.

2 shows a matching state with an analog subscriber in the converter according to the present invention. 2, the converter 220 according to the present invention has a loop trunk function for analog matching with the PSTN 120 network. When operating in connection with an analog subscriber of the PSTN 120 network, the access network 300 incoming call detects the subscriber incoming ring signal from the PSTN 120 in the analog trunk, and the V5.2 LE protocol controller calls the AN 300. Perform the incoming procedure. When the AN subscriber responds, the loop relay of the analog trunk is looped to notify PSTN 120 of the completion of the call. If the PSTN network subscriber relinquishes the call midway before the AN subscriber response, the call is terminated by performing the V5.2 call termination procedure.

AN subscriber origination is performed by the V5.2 AN 300, and the V5.2 LE controller loops the loop relay of the analog trunk connected to the subscriber when this procedure is completed. At this time, the calling subscriber can hear the dialing tone and if the dialing number is pressed, the normal call is connected. AN originating control of this device is completed by trunk trunk relay to loop on.                     

The call termination procedure is the same for AN incoming or outgoing calls. That is, when the AN subscriber is on-hook, the AN 300 performs a call termination procedure. If the PSTN subscriber is off-hook, the analog loop trunk of the device cannot detect this. The AN subscriber on the call must off-hook upon listening to a particular tone from the PSTN 120. When the V5.2 call termination procedure is completed from the AN 300, the V5.2 LE control unit notifies the PSTN 120 of the call termination by turning off the route of the loop trunk.

When the AN subscriber hook flash, the V5.2 LE control unit turns off the loop relay for a predetermined time when receiving the hook flash control information from AN so that the AN subscriber can receive the hook flash function provided by the PSTN 120. do.

In the case of a payphone subscriber, the PSTN 130 transmits a specific charging signal to the subscriber line. The analog trunk of the apparatus can detect a polarity reversal signal and a 12KHz / 16KHz signal. Upon detecting this signal, the V5.2 LE control unit executes the V5.2 control procedure to enable the AN to charge.

3 shows a matching state with an ISDN BRI subscriber in the converter according to the present invention. Referring to FIG. 3, the converter 230 according to the present invention has a BRI NT matching function for PSTN 130 network and digital subscriber line (ISDN BRI) matching. The basic call procedure of the ISDN BRI interface follows the conventional ITU-T standard, but the device detects a specific message in the call procedure and performs a V5.2 ISDN call vehicle and all ISDN from the PSTN 130 network or the AN 300. The message is sent to the AN 300 or the PSTN 130 to control the call.

In case of an AN incoming call, when receiving a UI setup message broadcasted from a PSTN BRI, the V5.2 controller performs a V5.2 ISDN call procedure and transmits the received message through the V5.2 ISDN designated channel. To send. When the AN subscriber is called, the ISDN incoming message is transmitted to the PSTN 130 network.

In the AN call, the AN subscriber sends the setup message to the PSTN network, and when receiving the setup response message, the V5.2 LE controller performs the ISDN calling procedure by using the B channel information included in the message. When the call is terminated, the ISDN call termination procedure is performed when a release message is detected regardless of the origination / incoming call.

4 shows a matching device with a digital trunk according to the present invention. Referring to FIG. 4, the V5.2 converter 240 according to the present invention has a trunk matching function for matching the PSTN 140 network and the digital trunk line E1. It has a signal processing unit for signal matching of digital trunk and has R2 register signal and ISDN PRI message processing function. When the digital trunk interface with the PSTN 140, the control procedure is the same as the normal relay and PRI control procedures of the general exchange, and the apparatus of the present invention, which detects the start and end of the call in this procedure, has a V5.2 LE matching function. It performs a matching service to the access network 300 to the PSTN (140) network.

As described above, the V5.2 protocol conversion apparatus according to the features of the present invention can be configured, but the specific embodiments have been described in the above description of the present invention, and various modifications can be made without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be defined by the described embodiments, but by the claims and equivalents of the claims.

The conventional access network can serve only if the P5.2 network has a V5.2 LE protocol matching function. In contrast, even when the V5.2 LE matching function is not supported in the PSTN network according to the present invention, the AN is provided between the PSTN and the access network to provide the V5.2 LE matching function so that the AN can access and service the PSTN network. Can provide functionality.

Claims (4)

A V5.2 protocol converter for providing a V5.2 local switched matching function between a switching network and an access network that does not support V5.2 local switched matching, A physical interface having at least one of an analog trunk, a general information communication network basic rate interface, and a digital trunk to detect a signal related to call start, progress, and termination from the switching network to enable service with the access network; A digital trunk interface as an interface for matching with the access network, And a control unit performing a V5.2 local exchange protocol control function according to an internal control call processing procedure and performing a matching operation with the access network according to an internal control call processing procedure. The method of claim 1, wherein the analog trunk interface matching is connected to a general subscriber on the switching network, and the trunk controls the loop of the subscriber line and detects an incoming ring signal, a line polarity signal, and a public telephone billing signal. V5.2 protocol conversion device. 2. The apparatus of claim 1, wherein the general information network basic rate interface matching is connected to the general information network basic rate interface on the switching network side via a U-interface and operates as a network terminal function. The V5.2 protocol according to claim 1, wherein the digital trunk interface has the same function as a general trunk physically and operates as a general information network premium rate interface or a general relay line according to a matching function of the switching network side. Converter.

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