Nortel Networks OPTera Metro 3500 - Manual (Page 272)

3-44 Hardware feature descriptions
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
OPTera Metro 3500 BIP (European deployment)
(NTFW56BA)
The BIP NTFW56BA (for European deployment) is mounted at the top of the
OPTera Metro 3500 equipment frame. Two redundant office battery inputs
(-48 V dc) independently feed a separate set of four 15A circuit breakers,
which in turn feed equipment in the rack. The power terminals on the
NT7E56BA breaker interface panel are located behind the front left-hand
panel of the chassis. See
Table 3-3 on page 3-6 for operational temperature
ranges.