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List of terms
VLAN identifier (VID)
A VLAN identifier (VID) is a
IEEE802.1Q tag header.
VM
See Virtual Media (VM) (page 142).
voice band data (VBD)
Modulated data calls, typically fax and modem calls, carried on a voice connection.
voice compression
The process of electronically modifying a
voice gateway control protocol (VGCP)
A Nortel Networks proprietary version of the simple gateway control protocol (SGCP). VGCP is one possible control interface between the media gateway controller and the Media Gateway. (VGCP is also known as ASPEN).
voice networking
A service that allows the user to dynamically interconnect voice switches, such as PBXs, through SVCs.
voice networking call server (VNCS)
The voice networking call server is a database which provides routing and voice profile information, based on the dialed number, to PORS during voice networking SVC establishment.
VoIP
See voice over Internet Protocol (VoIP) (page 145).
voice over frame relay
A Nortel Multiservice Switch system encapsulation protocol that manages prioritized egress queues and repackages payload frames to assure the dominance of multimedia (dominantly voice) traffic over application data traffic. Large data frames are fragmented to avoid multimedia delays and link frames are packed with data fragments to assure optimal link bandwidth usage.
voice over Internet Protocol (VoIP)
Voice traffic over an IP network using ATM or Ethernet transport capabilities.
Nortel Multiservice Switch 7400/15000/20000
Terminology
PCR7.2 and up March 2006
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