User's Manual

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.

TAC

Trunk access code

TDM

Time-division multiplexing

TTR

Touch-tone receiver

UID

Call redirection

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.

WAN

Wide-area network