Nortel Networks DCT1900 - Manual (Page 42)

Technical Product Manual - DCT1900
System Description, Radio Exchange Boards
4-4 System-DCT1900/R8/mw
© 2000-2005
4.5 Cell Link Unit - CLU (REX-BRD0014 or ROFNB 157 11/2) or
CLU-S (REX-BRD0016 or ROFNB 157 16/2)
The CLU interfaces between a SPU and a Base Station. Every CLU board contains eight CLC (see
Figure 4-3). Each CLC communicates with one Base Station.
The main functions of the board are:
z Provides eight simultaneous speech channels from the RE to a Base Station.
z Provides TDMA frame synchronization and power for the Base Stations.
The Base Station control, TDMA frame generation and radio link maintenance functions are
implemented in the Base Station.
For signalling distances up to 2.2 miles, a CLU may be used with appropriate powering and cable
types. For signalling distances up to 1.2 miles, a CLU-S may be used with appropriate powering
and cable types.
Fig. 4-3 CLU/CLU-S
CLC
8
CLC
1
BC
Peripheral
P8
Peripheral
P1
Base
Station
Base
Station