Time Slot
TSA
Time Slot Assigner
UART
Universal Asynchronous Receiver/Transmitter
UAS
Unavailable Seconds. Incremented by 10 when LOS has remained for more than 10
consecutive seconds and incremented by 1 every second until LOS is removed.
UDP
User Datagram Protocol
UI
Unit Interval
UNI
User Network Interface
User card
A Voice card, Data card, or Alarm card.
VBR
Variable Bit Rate
VC
Virtual Channel
VCL
Virtual Channel Link
VP
Virtual Path
VPC
Reference Guide
E-19