5–8
Troubleshooting
Table 5–2 (Cont.)
Troubleshooting a DECrepeater 90C in a DEChub 90
Backplane
If...
Then...
Do this...
If the cable is not
connected at the
other end.
Connect the other end of this
cable and terminate.
If the cable is
connected at other
end, the cable may
not be continuous.
Check the cable for continuity.
The cable may be
defective.
Replace with a known good
cable.
If the cable is
continuous, the
cable may not be
properly terminated.
Properly terminate the cable.
If the port LED
turns on, the port is
okay.
No action is required.
If the port LED
remains off, test the
failing port.
Remove the cable from failing
port and replace with a 50-ohm
terminator.
If the port LED
remains off, the
DECrepeater 90C is
defective.
Replace the DECrepeater 90C.
