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5-25
ETH IN
Green LED
Not Lit
Loss of Ethernet RCV/radio XMT
signal in. Most probable causes:
1. Cable between link partner and
radio is disconnected/broken.
Connect/repair cable.
2. Speed/Mode provisioning mis-
match between link partner and
radio
1. Check local Ethernet facility provi-
sioning screen.
2. Check link partner provisioning.
ETH
ALM
Yellow LED
Lit
Summary alarm, could be caused
by XMT or RCV Ethernet degrade
Use USI to determine if degradation is
in the input or output side.
ETH
OUT
Green LED
Not Lit
Loss of Ethernet XMT/radio RCV
signal out. Most probable causes:
1. Loss of RF input to radio RCVR
Check local RSL screen on USI. Is RSL
ok?
Yes - Check farend for Ethernet alarm.
No - Check farend XMTR output. Is
farend XMTR Out ok?
Yes - Check path, antenna,
waveguide/cabling
No - Check/replace farend XMTR.
2. Loss of Ethernet input to radio
RCVR
Check farend for Ethernet alarms.
Are any alarms indicated?
Yes - Troubleshoot farend alarms
No - Check farend Ethernet status. Is
only abnormal status indicated?
Yes - Troubleshoot farend Ethernet sta-
tus.
No -
1. Replace local alarmed Ethernet I/O
Interface module.
2. Replace local RCVR module.
Table 5
-
3 Troubleshoot Using Ethernet I/O Interface Module Indicators (Cont.)
LED
Indication
Probable Cause
Corrective Action
Summary of Contents for MDR-8000
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