User Manual

Cabinet description
Nortel Networks Confidential
1–38
PE/DCL/DD/0063
411–9001–063
Standard 12.07/EN September 2000
GSM/BSS V12
Climatic compartment
This compartment contains three fans, and the FANICO board (FANICO PCB–
Printed Circuit Board). One fan is optional and is used to ensure redundancy. This
board enables the control of the rotation of each fan and sends an alarm (one for each
fan) to the ALCO or RECAL board when the fan speed goes below a fixed threshold.
1.2.2.2 BCF cabinet
The layout of the BCF cabinet is presented in Figure 1–17 and Figure 1–18.
Upper compartment
This compartment contains three fans and a FANICO board (identical to the one in
the radio cabinet). Rotation management alarms are sent to the ALCO board.
There are three 800mA–fuses on the front panel of the BCF to protect the fans.
Lower compartment
This compartment contains the following BCF boards:
three PCMI boards
two gateway boards (GTW)
two control and switching units (CSWM)
four data signaling concentration units (DSC)
two synchronization modules (SYNC)
three 48 V / ± 5 V / 12 A converters (one converter is optional)
one Power Supply CoMmanD unit (PSCMD).
There is a 4A–fuse on the front panel to the left of the BCF board to protect itself.