IBM 3745 Problem Determination Manual page 317

Ethernet-Type line Problems (ESS)
4
Check if the green power light on the tailgate is on.
If the light is on, go to next step.
If the light is off, take the appropriate action.
•
•
[M~~~~:~:~:1:~9~:~:~j$.:9~::~j~:Q~::j?q]
CO
tM9:~:!~~f~~~9~:::!1:9~:::~1:9~::·~~9]
Use the MOSS
pas
function to check the status of the Ethernet line adapter
power. If it is down, power it up.
CO
if you are not successful.
5
Make sure:
• The MAU is operational.
(MAU which is the media access unit is also known as the transceiver.)
• At installation time, you checked:
- The MAU (or transceiver) meets Ethernet V2 or IEEE 802.3 standard
requ irements.
(Some MAU's are more sensitive than others to electromagnetic
environment and may degrade the 3745 performances.)
- The SQE-TEST function is enabled. The MAU must have this function (also
known as HEARTBEAT function) when it is attached to a 3745. The 3745
needs it to check proper operations of collision signal paths.
After checking and correction, if the problem persists, go to the next
~tep.
11-2
IBM 3745 Communication Controller: Problem Determination Guide
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