VoIP 기술은 인터넷 망 계층 프로토콜인 IP(Internet Protocol) 상에서 데이터 뿐만 아니라 음성 서비스를 동시에 제공할 수 있도록 지원하는 기술을 말한다. 이 기술은 인터넷이 급속하게 확산되고 이용자가 폭발적으로 증가함에 따라 인터넷 서비스에서 부각되는 기술로 자리잡고 있다. 현재 VoIP기술을 위한 표준 기술은 H.323과 SIP가 있다. IP 네트워크를 통해 음성전달을 가능케 하는 VoIP(Voice Over IP)가 소개되고 H.323, SIP와 같은 시그널링 프로토콜들이 제안되면서 텔레포니 서비스에 많은 변화를 가져왔다. 국내 대부분의 인터넷 전화 사업자는 H.323기반 인터넷 전화 서비스를 제공하고 있으며 향후 SIP기반의 인터넷 전화 사업자가 등장할 것으로 예상된다. 본 논문에서는 현재 국내 대부분의 인터넷 전화 사업자가 채택한 H.323기반의 인터넷 전화서비스를 사업자간에 연동하기 위한 연동 기술을 살펴본다.
KSP Keywords
Internet protocol(IP), Voice-over-IP(VoIP)
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