33(48)
Date
Rev
Documentnumber
Prepared
Doc respons/Approved
Checked
Reference
1999-07-15
A
1531-BDV BS 101 05 Uen
INSTALLATION INSTRUCTION
Subject responsible
7.4.2
Base Stations Cabling
Using a four-pair cable or more-pair cable, the free cable pairs can be used as additional power wires (EPP) to increase
the feeding distance and reduce overall power consumption (by reducing the ohmic resistance) to the BS. The BS can
also be powered by an on-site adapter (refer to
Connection of serial communication wires and EPP lines is polarity-independent. SC0-0 and SC0-1 may be
interchanged but SC0-x and SC1-x may not be interchanged. The diagram below shows the wiring principle to each
base station connected to the IC-CU2.
Power feeding of the Base Station
There are three alternatives to power feed (-48V) the Base Station:
•
The power feeding can be taken via the IC-CU2 from the back plane in the cabinet. The DIP-switch on the
IC-CU2 is set to OFF.
•
From an external power source via the front connector on the IC-CU2 (
≤
56V). Note the polarity on the
input (see drawing of IC-CU2 board). The switch on the IC-CU2 is set to ON.
•
By an AC-adapter (see
). The switch on the IC-CU2 should be set to ON to cut off
power feeding via the front connector on the IC-CU2.
intermediate
floor
e.g. 40m
Ground floor
Base
Station 1
16m
3,5m
corridor