What are the leading VoIP
The most popular are H.323, the original protocol established
by the International Telecommunications Union, and SIP or Session
Initiation Protocol, a text base protocol that is greatly simplified
by the more multimedia capable H.323.
What is a VoIP Gateway?
The gateway is a piece of equipment or a circuit card that interfaces
between two incompatible network standards, VoIP and PSTN or the
Public Switched Telephone Network. VoIP is based on packets. The
PSTN is based on circuit switching. A VoIP gateway gives the enterprise
VoIP system the ability to make and receive calls outside the
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