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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Glossary and Abbreviations
GL-6
Subnet Trunking
A feature permitting the manipulation of digits on outgoing AAR and ARS calls, based on the
selected routing preference.
SVC
Switched Virtual Connection—a virtual link established through an ATM network; the basic building
block of port network interconnectivity. Two SVCs, one in each direction, are required for a
bi-directional talk path between two port networks in ATM-PNC configurations.
T
TAC
Trunk access code
TDM
Time-division multiplexing
TTR
Touch-tone receiver
U
UID
Call redirection
V
VC
Virtual circuit
VCI
Virtual channel identifier—a unique, numeric tag (16-bit field in cell header) that identifies every
virtual channel across an ATM network
VDN
Vector directory number
Virtual Path Identifier (VPI)
The 8-bit field in the cell header that indicates the virtual path over which a cell is routed.
W
WAN
Wide-area network