Nortel Meridian 1 Manual page 112

Page 98 of 190 Clearing network equipment faults
Possible cause
Defective
controller card
Defective PE card
Defective
fibre-optic span
Defective terminal
equipment
553-3001-510 Standard 11.00 June 1999
Action
If you receive an OVD message, replace the superloop network card.
If the card is disabled, enable it by executing the ENLL loop command. If
the response is UNEQ, install the card correctly and observe self-test.
Perform the Fibre Peripheral Controller card self-test:
DSXP x "x" represents the controller number.
If the test passed, enable the card by executing:
ENXP x "x" represents the controller number.
If the test failed, check the maintenance display codes on the controller
card and wait for an OVD message. In the OVD message is received,
replace the card.
If there is no OVD message, go to the next possible cause.
Reinsert the PE cards one at a time. Wait for an OVD message after each
card is inserted.
If the red LED lights when a card is inserted, software disable the card,
then try to reenable it. If it will not enable, replace the card.
If you receive an OVD message when one of the PE cards is inserted,
replace that card.
If there is no OVD message as you insert the cards, go to the next
possible cause.
To check the fibre-optic span, perform loopback test across the span.
Load LD 45 and execute the XCON 6 test with Fibre Superloop Network
card as the generator and detector with span looped at the Fibre
Peripheral Controller card at the Fibre Remote IPE.
Check the test results and proceed accordingly.
Check terminal equipment (such as attendant consoles and telephones)
on the disabled loop.
If you find defective terminal equipment, see the appropriate chapter
(such as "Clearing attendant console faults" on page 145) to fix the fault.