User's Manual

Ethernet LAN
08/01/2001
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1X SCt4812ET Lite BTS Optimization/ATP
PRELIMINARY
Ethernet LAN Termination
For proper operation, each end of the primary and redundant BTS
Ethernet Local Area Networks (LAN) must be terminated with a
50–ohm load. For a BTS consisting of a single frame, this is done by
placing 50–ohm triaxial terminations on the LAN A and B external IN
and OUT connectors located in the power entry compartment
(Figure 2-2). When the LAN links multiple frames in a logical BTS, the
50–ohm triaxial terminations must be installed on all uncabled LAN A
and B external connectors on each frame.
Check the LAN A and B external IN and OUT connectors in the power
entry compartment of each frame, and be sure terminations are installed
on all the uncabled external LAN connectors.
Figure 2-2: External Ethernet LAN Connectors
SC4812ETL0024–2
Rear of Frame
(Power Entry Compartment
Door Open)
Section of Network Interface Panel
(Rotated 30_ Right)
LAN A OUT
LAN B OUT
LAN A IN
LAN B IN
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