Method and system for realizing public telephone exchange network simulation service

Abstract

A method for realizing simulation service of public telephone exchange network includes carrying out conversion between simulation user line signaling and SIP signaling in calling-conversation process by access signaling adaptive entity, realizing simulation user line signaling information transmission between SIP application server and said entity through SIP protocol and simultaneously carrying out relevant treatment by said server according to analysis of simulation user line signaling information for realizing PSTN simulation service.

Description

technical field [0001] The present invention relates to public switched telephone network (PSTN, Public Switched Telephone Network) emulation service technology, in particular to a method and system for realizing emulation service of PSTN for simulated subscriber line signaling interaction in a session. Background technique [0002] The analog subscriber line signaling is the signaling between the analog telephone terminal and the switching equipment transmitted on the analog subscriber line. The analog subscriber line signaling mainly includes the following four types of signaling: 1) user status signaling describing the status of the user, The user status signaling reflects the on-hook status of the analog telephone terminal. The switching device can detect whether the user is on-hook or not by detecting the presence or absence of current on the user line; 3) ring current and signal tone, which is the signaling sent by the switching device to the analog telephone terminal ...

AI Technical Summary

Problems solved by technology

[0017] 2) A large number of services that require analog subscriber line signaling interaction during the call session must be implemented on the AGCF, resulting in more complicated control software on the AGCF

[0018] For example, in the process of terminating the session in AGCF, all flashing analog subscriber line signaling related services must be implemented on AGCF, while ETSI TS3044V0.1.0 only provides call waiting and three-way calling and other business descriptions, there are many other services that rely on flashing analog subscriber line signaling, such as call forwarding, finding malicious calls, calling back when busy, and parking calls when busy. Signaling information, these services can only be realized on the AGCF

In this way, in the process of implementing a call session, the AGCF needs to perform a large number of services that simulate user line signaling interaction; for services involving multi-party sessions, the AGCF also needs to maintain multiple SIP session states; the AGCF also needs to control the MG to complete multiple session media Business media control and other requirements increase the complexity of the control software on the AGCF

[0019] 3) Complicated the management and maintenance of PES business

[0020] From the perspective of existing solutions, some PSTN services are implemented in the PES AS, and some PSTN services are implemented in the access signaling adaptation entity. This distributed service implementation mode makes it difficult to solve problems such as cooperation and conflicts between services. Moreover, service data configuration needs to be performed in the access signaling adaptation entity such as AGCF, which makes the management and maintenance of services more complicated

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