Reference Manual

Table Of Contents
Glossary
CPU Central Processing Unit
CSA Canadian Standards Association
CSES Consecutive Severely Errored Second
CSU Channel Service Unit
CU Combining Unit (RU in CDU_D)
CXU Conguration Switch Unit
Dannie ASIC in the TRU
DB DataBase
DC Direct Current
DCCH Dedicated Control CHannel
Dedicated control channels carry
signalling data.
DCCU DC Connection Unit
ddTMA Dual Duplex Tower Mounted Amplier
This type needs only one combined TX/
RX feeder from the BTS to the TMA.
>dTMA >rTMA >TMA >BTS
DF Distribution Frame
DFU Distribution and Fuse Unit
DIP DIgital Path
The name of the function used for
supervision of the connected PCM lines.
Dixie ASIC in the TRU
DM Degraded Minute
DM Distribution Module
DMRU Distributed Main Replaceable Unit
If a Main RU is subordinated to the
CMRU, it is said to be distributed.
Downlink Signalling direction from the system to the
MS
DP Digital Path
DPX Duplexer
DS1 Digital Signal level 1 (1544 kbit/s)
410 (421)
EN/LZT 720 0008 R1A
2001-06-26
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