Nortel 1000E Maintenance Manual page 89

Table 20
MG 1000T Core fault causes and actions (Part 2 of 3)
Condition
Data dump error, or
no access to overlays
while OVL005 message
is displayed
Red LED is lit on SSC
card
Red LED is lit on SSC
card
Possible cause
Security failure during
an upgrade
Manual initialize button
pressed when
performing a backup
using the Customer
Configuration Backup
and Restore feature
Card circuitry latched
Improperly installed
NTTK25 Software
Daughterboard
Defective NTTK25
Software
Daughterboard
Improperly installed
NTDK83 IP
Daughterboard
Clearing faults
Action
Re-enter the keycodes.
Note: Up to three invalid keycodes can
be entered. After the third invalid
keycode is entered, all current changes
are lost and the Setup Program returns
to the main menu.
Issue the ENLT command at the TTY.
Disable the SSC card, unseat and reseat
the card, then re-enable it.
If the fault persists, go to the next
possible cause.
Power down the system and remove the
NTDK20 SSC card.
Unseat the software daughterboard and
then reseat it.
Reinsert the NTDK20 SSC circuit card.
Power up the system.
Unseat the NTDK20 SSC circuit card
and replace the software daughterboard.
Reinsert the NTDK20 SSC circuit card.
Power down the system and remove the
NTDK20 SSC card.
Unseat the IP daughterboard and then
reseat it.
Reinsert the NTDK20 SSC circuit card.
Power up the system.
Communication Server 1000E
Page 89 of 162
Maintenance