System information

Troubleshooting Hardware
Book Title
3-38
Interface module
problems
The following tips will help you distinguish between problems in a line card
and problems in an access card:
• Run the manufacturing diagnostics and check the information provided
for the access card.
• Swap another line card of the same type. If the second card has the same
problem as the first one, the access card is probably at fault. If the second
card works properly, the first line card is likely to be the source of the
problem.
• Faults in the line card are more common than faults in the access card. If
you cannot determine which card is causing a problem, try replacing the
line card.
• Use the looping tests described in the LightStream 2020 Network
Operations Guide.
If you are having trouble bringing up an interface module, check the
following:
• Make sure the access card behind the line card is compatible with the line
card.
The low-speed line card (LSC) is compatible with the following access
card:
— Low-speed access card (LSAC)
The medium-speed line card (MSC) is compatible with the following
access cards:
— T3 medium speed access card (T3 MSAC)
— E3 G.804 medium speed access card (E3 G.804 MSAC)
— E3 PLCP medium speed access card (E3 PLCP MSAC)
The cell line card (CLC) is compatible with the following access cards:
— OC-3c single mode access card (OC3AC SM)—1 or 2 ports
— OC-3c multimode access card (OC3AC MM)—1 or 2 ports
— T3 access card (T3AC)—4 or 8 ports
— E3 access card (E3AC)—4 or 8 ports
Possible Problem Solution