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Cisco SIP IP Phone 7960 Administrator Guide
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Glossary
E
E.164
The international public telecommunications numbering plan. A standard set by ITU-T which addresses
telephone numbers.
E&M
Ear and mouth RBS signaling.
endpoint
A SIP terminal or gateway. An endpoint can call and be called. It generates and/or terminates the
information stream.
G
gateway
A gateway allows SIP or H.323 terminals to communicate with terminals configured to other protocols
by converting protocols. A gateway is the point where a circuit-switched call is encoded and repackaged
into IP packets.
H
H.323
An International Telecommunication Union (ITU-T) standard that describes packet-based video, audio,
and data conferencing. H.323 is an umbrella standard that describes the architecture of the conferencing
system and refers to a set of other standards (H.245, H.225.0, and Q.931) to describe its actual protocol.
H.323 RAS
Registration, admission, and status. The RAS signaling function performs registration, admissions,
bandwidth changes, status and disengage procedures between the VoIP gateway and the gatekeeper.