Nortel Meridian 1 Manual page 92

Page 78 of 190 Clearing common equipment faults
Possible cause
Defective serial
I/O ports
Defective IOP card
553-3001-510 Standard 11.00 June 1999
Action
Check each SDI port by entering:
LD 37
STAT TTY
— If software is disabled, try to enable it (software disable, hardware
disable, then try to reenable).
— If the card will not enable, replace it.
If the CPU is still faulty, go to the next possible cause.
Check the IOP card:
— Reinstall the IOP card, test it, and enable it:
LD 137
DIS IOP
TEST IOP
ENL IOP
****
If the CPU is still faulty, go to the next possible cause.
(continued)