Lucent Technologies FT-2000 OC-48 - Page 191

Power
Issue 8.0 July 2002
4-5
Each circuit pack is equipped with diodes and fuses that protect the power
feeders (Figure 4-4). A filtering section follows the fused input. Modular DC-to-DC
power converters on each circuit pack convert the −48 V to the voltages required
on the circuit pack.
Figure 4-4. Circuit Pack Power Distribution
Required
ORing
Converter
Filtering
Fuse
Limiter
Current
Diode
GND
DC/DC
RTN
-48 V
Voltages
RTN
-48 V
&
RTN
-48 V B
-48 V A
&