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Diagnostics and Troubleshooting
6-4
8000-A2-GB26-10
January 1999
Table 6-2. Major Alarms (2 of 2)
Alarm Action
Ethernet
Port Failure
1. Check cable connections to the DSLAM.
– If cables are terminated properly, go to Step 2.
– If cables are not terminated properly, terminate them correctly.
2. Check cable connections to the hub or Ethernet switch.
– If cables are terminated properly, go to Step 3.
– If cables are not terminated properly, terminate them correctly.
3. Check the Activity/Status LED at the Ethernet hub
.
– If Activity/Status LED does not indicate a problem, go to Step 4.
– If Activity/Status LED indicates a problem, take appropriate action.
4. Disconnect the Ethernet cable and replace it with a working cable
from a spare port on the hub.
– If the replacement cable works, the original is bad and should be
permanently replaced.
– If the replacement cable does not work, reconnect the original
cable and go to Step 5.
5. Move the DSL card and cable to another (spare) slot.
– If this solves the problem, the connector or interface panel
connections for the original slot are bad. Schedule maintenance for
the chassis and try to use the spare slot temporarily.
– If this does not solve the problem, the DSL card is probably bad
and should be replaced.
DSL Port
Failure
1. Check the Selftest Results display by following the menu selection
sequence:
Diagnostics
→
Selftest
(D-A)
2. Do another Selftest (Reset) and check results.
– If the results are normal, the problem was transient. Log the results.
– If the results are the same as the first self-test, the card should be
replaced. If only one port on a DSL card is bad, that port can be
disabled. You may continue to use the card until it is convenient to
replace it.
DSL Card
Not
Responding
(LEDs on
card are out
or MCC is
showing an
alarm.)
1. Check to see if the lights are out on the DSL card.
– Plug the card into an empty slot to see if it responds. If not, the card
is bad and needs to be replaced.
– If the card responds in a different slot, the slot connector may be
bad. Call your service representative.
2. Check to see if the DSL LEDs are on.
– If not, pull the card out and plug it in again.
– Reset the card from the MCC or DSL Main Menu.
– Go to the MCC Main Menu and clear NVRAM.
– Replace the card.