Reference Manual

Glossary
SIR Small Indoor RBS
SMS Short Message Service (point to point)
A short message, up to 160 alphanumeric
characters long, can be sent to or from an
MS (point to point).
SO Service Object
SS Swedish Standard
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 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
TCB Transceiver Control Board
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
EN/LZT 720 0008 P2A
2001-11-28
483 (485)
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