한국통신학회논문지 B : 네트워크 및 융합 서비스, v.29, no.1B, pp.101-108
ISSN
1226-4717
Publisher
한국통신학회 (KICS)
Language
Korean
Type
Journal Article
Abstract
SIP(Session Initiation Protocol) 프로토콜을 이용한 인터넷전화 서비스가 제공되기 시작하면서, 기존의 PSTN에서 제공되고 있는 호 전환, 무응답 또는 통화 중 호 전환, 호 필터링 서비스 등 다양한 부가서비스 개발에 대한 관심이 높아지고 있다. 호 처리 언어(CPL)는 XML기반의 스크립트 언어로서 여러 유형의 인터넷전화 부가서비스를 명시하고 제어할 수 있는 표준기술에 해당한다. 본 논문에서는 응용 계층의 호 시그널링 프로토콜로서 SIP를 이용하고 호 처리 언어 기술을 이용하여 개발된 인터넷전화 부가서비스 시스템에 대해 기술한다. 이 시스템은 크게 SIP User Agent를 포함하는 CPL 클라이언트, SIP 프락시 서버, 레지스트라 그리고 CPL 서버로 구성되는데, 본 논문에서는 이 중 CPL 서버에 대하여 구체적인 설계와 구현에 대해 기술하고자 한다. CPL 시스템은 리눅스 7.2환경에서 C와 C++를 이용하여 구현되었다.
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