Understanding the Capabilities of Gateway Protocols
.. H.323 is the most supported gateway protocol, backed by the Cisco
1750, 2600, 3600, AS5300, 7200, and 7500 Series routers.
.. Skinny Station Protocol allows a Skinny client to use TCP/IP to
transmit and receive calls as with DT-24+, DE-30+, and VG200.
.. MGCP is a master/slave protocol, where the gateway is the slave
servicing commands from the master, which is the call agent.The
MGCP protocol functions in an environment where the call control
intelligence have been removed from the gateway.
.. Session Initiation Protocol (SIP) is an application layer control protocol
that can establish, modify, and terminate multimedia sessions or calls.