Nortel Meridian 1 Manual page 71

Possible cause
Defective SDI
CPU card
(lit LED)
Defective
backplane
Clearing common equipment faults
Action
Check each SDI port by entering:
LD 37
TTY x "x" represents the number of the interface device
attached to the port
— If software is disabled, try to enable it (software disable, hardware
disable, then reenable).
— If the card will not enable, replace it.
If the CPU is still faulty, go to the next possible cause.
Check the CPU card:
— Make sure the ROM card is properly installed.
— As necessary, replace the CPU card and the ROM card.
If the CPU is still faulty, replace the memory/peripheral signaling card.
If the CPU remains faulty, go to the next possible cause.
Replace the card cage assembly in the module.
Page 57 of 190
Meridian 1 Fault clearing