Glossary
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 that is not
loadable is classified as a sub-RU.
SW
Software
SWR
Standing Wave Ratio
SYNC
Synchronous
T1
Transmission facility for DS1
(1544 kbit/s).
TCB
Tranceiver Control Board
TCH
Traffic CHannel
The traffic channels carry either encoded
speech or user 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.
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
TMA
Tower Mounted Amplifier
TN O&M
Transport Network Operation and
Maintenance (in general).
Tora
ASIC in the TRU
TRA
Transcoder Rate Adapter
EN/LZT 123 2697
R5A
1998-08-13
305 (306)
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— All Rights Reserved —
