Nortel Networks 8000 Series - Manual (Page 46)

46 Adding and replacing DC power supplies
313070-E Rev 00
3 Turn the power supply switch to the off position ( Figure 23 ).
Figure 23 DC power supply power switch
4 Disable the incoming power from the DC input power source. You may need
to switch a circuit breaker or turn off the DC input power source.
Danger: Make sure that the DC power source is off by switching off the
circuit breaker or disconnected at the remote end before you connect or
disconnect cables on the power supply.
10298FA
1 = On
2 = Off
2
1
-DC
+DC