5–8
DECconcentrator 500 Installation
Use the following procedure to perform the loopback test:
1. Install the loopback connector.
2. Observe and record the port LED status on that port. The port status LED
should blink red.
3. Refer to Table 5–5 for corrective action.
If you have a port or card fault, see your system/network manager or authorized ser-
vice representative for help.
Table 5–5:
Problem Solving During Loopback Testing
Symptom
Probable Cause
Corrective Action
Port LED red on, green on, or
blinking green.
Port failure.
The card needs to be replaced or re-
paired. Contact your system/network
manager or service provider.
Port LED blinking red.
Normal during loopback test-
ing. Original problem could
be with the cable or device
at the other end of the
cable. The transmit power
may be out of specifications.
Check the operational status of the
device at the other end of the link. If
the problem persists contact your
system/network manager or service
provider.
If the problem continues, do the following :
1. Disconnect the power cord before performing any corrective action.
2. Check your warranty or service agreement for information about getting ser-
vice and the type of service you have.
3. Notify your system/network manager or authorized service representative
about the problem.
4. Give a copy of your problem-solving record to your system/network manager
or service representative.
Summary of Contents for DECconcentrator 500
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Page 58: ...Using Out of Band Management 4 13 Example 4 9 Displaying Show Line Characteristics Cont...
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