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Internet Phone
Service New Zealand |
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An internet phone is a special
voice over IP (VoIP) terminal that is designed to be used over
the Internet.
Typically, it uses the Session Initiation Protocol (SIP) or
Media Gateway Control Protocol (MGCP).
Most regular VoIP phones can be used as Internet phones with a
little tweaking, but first-generation Internet phones such as
the PingTel Expressa have been on the market since 2001.
Second-generation Internet phones are expected to have features
including:
SIP support with extensions like:
Third Party Call Control.
Support for open codecs for voice encoding.
Support for IPv6 and NAT traversal.
Companies such as Cisco Systems and SocketIP are expected to
release second-generation Internet phone platforms in 2002. |
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