User's Manual Part 3

RBS 2109 User’s Guide
SS
Swedish Standard
sTRU
single Transceiver Unit
Sub-RU
A sub-replaceable unit is always connected to a
superior Main RU. This connection is used for example
for retrieval of the RU identity. A sub-RU normally does
not have a processor. Note that an RU with a processor,
which cannot be loaded, is classified as a sub-RU.
SVS
System Voltage Sensor
SW
SoftWare
SWR
Standing Wave Ratio
SYNC
Synchronous
T1
Transmission standard, G.703, a 1544 kbit/s PCM link
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
TCB
Transceiver Control Board
TCH
Traffic CHannel
The traffic channels carry either encoded speech or
user data.
TCH/F
Traffic Channel, Full-rate
TCH/H
Traffic Channel, Half-rate
TCC
Transmission Coherent Combining
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.
237EN/LZT 720 0090 Uen R1A 2004-09-17