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Development of SIP based Call Processing Language Server System  

Yi Jong-Hwa (한국전자통신연구원)
Min Kyung-Joo (한국전자통신연구원)
Kang Shin-Gak (한국전자통신연구원)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.1B, 2004 , pp. 101-108 More about this Journal
Abstract
SIP(Session Initiation Protocol) is a suitable protocol for supporting Internet telephony services and currently market requirements fur developing supplementary telephony services such as unconditional call forwarding, call forwarding on busy or no answer, call filtering services have recently grown. CPL(Call Processing Language) is a standard technology that can be used to describe and control internet telephony services. In this paper, we describe the CPL system for supplementary Internet telephony services using SIP as an application level call signaling protocol. Those supplementary services are composed of CPL client which is a SIP UA, SIP Proxy server, Registrar and CPL server In this paper, we describe the design and implementation of the CPL server system in detail which is developed in Linux 7.2 using C and C++ programming languages.
Keywords
Call Processing Language; SIP;
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  • Reference
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