ADC PG-Flex FRL-842, Руководство пользователя

Страница: 148 / 152

SCP-FRL842-013-01H April 22, 2003
136 ADC Telecommunications, Inc.
L
LED – Light Emitting Diode
LOS – Loss of Signal
LS/GS – Loop Start/Ground Start
LU – Line Unit
M
MLT – Mechanized Loop Testing
MU – Management Unit
MUX – Multiplexer
N
NEBS – Network Equipment Building System
NT1 – Network Termination Type-1
P
PCM – Pulse Code Modulation
PGTC – Pair Gain Test Controller
PM – Performance Monitoring
PBX – Private Branch Exchange
POTS – Plain Old Telephone Service
PPM – Parts Per Million
R
RD – Receive
REN – Ringer Equivalence
RMA – Return Material Authorization
RT – RemoteTerminal
S
SES – Severely Errored Seconds
SYNC – Synchronization
T
TBCU – Test Bus Control Unit
TD – Transmit
U
UAS – Unavailable Seconds
Z
ZBS – Zero Bit Substitution