Nortel 8600 dslam 用户手册
4-1
8600-A2-GN20-20
October 1997
Troubleshooting
4
Power Failure Troubleshooting Procedures
The following illustrates the steps to take when either the PWR A or PWR B
LEDs, or both, are OFF.
LEDs, or both, are OFF.
1. Using a voltmeter, check for power at the terminal connections.
— If there is power, call your sales representative for service to the 8600.
2. If there is no power at the terminal, call the appropriate electrician.
Power LED is OFF
PROBLEM:
One of the DC PWR LEDs is OFF due to a failure in a single
chassis within a stack.
chassis within a stack.
ACTION:
Go to the stack to see which chassis has the power failure. To
clear the power alarm, remove the power from the chassis and
disconnect the powered-off chassis from the management
daisy chain (bypassing the failed chassis). Follow the
appropriate power failure troubleshooting procedure described
above.
clear the power alarm, remove the power from the chassis and
disconnect the powered-off chassis from the management
daisy chain (bypassing the failed chassis). Follow the
appropriate power failure troubleshooting procedure described
above.