2004•Unpublished venueRequires access

Development of SIP based Call Processing Language Server System

Yi Jong-Hwa, Min Kyung-Joo, Shin-Gak Kang

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.

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Available abstract

Key concepts: SIP trunking, Session Initiation Protocol, Voice over IP, Telephony, Call control, Computer science, Computer network, The Internet