control protocol / session control protocols / sub-protocols / Internet Telephony / multimedia services / telephony / secure Internet connections / telephone lines / supplementary services / media paths / on voice communications / transport protocol / text-based application layer protocol / network using voice communication protocol / Voice over Internet Protocol / voice communication protocols / lightweight protocol / packet-switched network / conventional telephone system / with other protocols / packet telephony network / session management / telephony system / VOICE OVER IP / few still use proprietary protocols / /
NaturalFeature
Call Connection Channel / /
Organization
Government of HKSAR / United Nations / Government of the HKSAR / /
Position
Media Gateway Controller / /
Technology
S/MIME / IP telephony / session control protocols / HTTP protocol / Real-time Transport Protocol / lightweight protocol / 4 Session Initiation Protocol / VoIP technology / SIP protocol / operating system / UDP / Anti-virus Software / packet-switched / MGCP / text-based application layer protocol / MEDIA GATEWAY CONTROL PROTOCOL / circuit-switched / encryption / 5 Media Gateway Control Protocol / PSTN / also tried exploiting VoIP technology / transport protocol / Network Address Translation / 10 Encryption / control protocol / IP network using voice communication protocol / S/MIME-based encryption / SESSION INITIATION PROTOCOL / H.323 / H.323 protocol / voice communication protocols / VOIP / PBX / Real-time Transport Control Protocol / /
VOICE OVER IP SECURITY February 2008 © The Government of the Hong Kong Special Administrative Region The contents of this document remain the property of, and may not be