Reference Manual

Product Data RBS 2206
where the second base station can be located at some distance from the
first one. Both base stations use the same transmission line to the BSC.
The cable from the previous and to the next base station in the chain is
connected through four PCM cables A-D.
6.6 BBS 2000 Rack Description
P008268A
B
B
S
2
0
0
0
BFU-21
DC/DC
Batteries
1850
1800
400
B
B
S20
0
0
B
B
S
20
0
0
B
B
S20
0
0
Unit of measurement: mm
Figure 59 Example of three battery stands
Battery back-up is used to power the site during mains power failure
and also to protect the site from short interruptions in the AC mains
supply. It is available in an external cabinet.
It is possible to supply external transmission equipment from the battery
cabinet. The transmission equipment is provided with power supply
longer than the RBS.
In event of mains failure, the batteries in the BBS 2000 will deliver the
necessary power to the radio cabinet as well as to the transmission
equipment, if used. This enables the radio system to operate during
mains failure.
The battery back-up can be delivered for 1, 2, 4, 6 or 8 hours back-up
time, depending on the chosen configuration of the RBS.
The BBS can feed +24 V DC or -48 V DC to the TM equipment. The
-48 V DC supply requires an internal DC/DC converter in the BBS.
It is possible to share battery back-up between RBS 2202 and
RBS 2206.
6.6.1 Converting BBS 2202
If BBS 2202 is used, a conversion kit is needed to run RBS 2206. The
battery fuse unit determines which conversion kit should be used:
BFU-21: product number BMY 201 237/5
BFU-22: product number BMY 201 237/6
EN/LZT 720 0008 P2A
2001-11-28
127 (485)
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