Nortel 1000E Maintenance Manual page 102

Page 102 of 162
Fault clearing procedures using an SDI terminal
Table 24
Trunk fault indicators
Indicator
System messages
Visual indicators
553-3041-500 Standard 1.00
Clearing faults
Refer to Table 24 for trunk fault indicators.
Possible indications
ERR090, 220, 270
OVD001—010
TRK messages
Red LED lit on trunk circuit card
Trunk cannot make or receive calls
A user cannot make or receive calls over a trunk. An OVD system message
may be received, indicating that this trunk has been disabled. Look up all
system messages in the Software Input/Output: System Messages
(553-3001-411) and follow the instructions.
If the fault does not clear, manual continuity tests can be used to isolate faults
to peripheral equipment, such as E&M or Universal Trunk circuit cards. See
the Software Input/Output: Maintenance (553-3001-511) for details on
performing the tests in LD 30.
Trunk connections from the main frame to the trunk cards can be checked
with a butt set or test set. Check the trunk wiring at the entry point for dial
tone and progress toward the Media Gateway.
Constantly observe and look up system messages as you replace equipment.
You may need to replace:
• E&M Trunk circuit card: NT8D15
• Universal Trunk circuit card: NT8D14
• any other trunk circuit card
• NTDK20 SSC card
• trunk equipment (such as music source or paging equipment)
September 2004