Reference Manual

Glossary
SW SoftWare
SWR Standing Wave Ratio
SYNC Synchronous
T1 Transmission facility for DS1 (1544 kbit/s)
TA Timing Advance
A signal sent by the BTS to the MS which
the MS uses to advance its timing of
transmissions to the BTS to compensate
for propagation delay.
TC Transaction Capabilities
TCH Traffic CHannel
The traffic channels carry either encoded
speech or user data.
TCH SIG Traffic CHannel Signalling
TD Transmit Data
TDMA Time Division Multiple Access
Multiplexing of several channels in a
common frequency band. Each channel is
assigned a certain time division, a time
slot.
TDMA frame GSM air interface time frame comprising
eight time slots
TDR Time Domain Reflectometer
TEI Terminal Endpoint Identifier
TEI is an identification code carried by a
LAPD frame as a terminal connection
endpoint within a Service Access Point
(SAP).
TEMS TEst Mobile Station
TF Timing Function
TG Transceiver Group
Timing bus The timing bus carries air timing
information from the timing unit in the
DXU to the TRUs.
TM Transport Module
EN/LZT 720 0008 R1A
2001-06-26
419 (421)
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