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5-24
5.10
ETHERNET-SPECIFIC TROUBLESHOOTING
The LEDs on the front panel of the Ethernet I/O Interface module and the alarms on the
radio USI status and alarm screen are the first indication of a fault. Troubleshoot radio
XMT and RCV alarms using the procedures in the MDR-8000 Instruction Book/Users
Manual. Troubleshoot Ethernet alarms as follows:
5.10.1
Troubleshooting Using Ethernet I/O Interface Module Front Panel Indicators
3. In this analysis, troubleshoot using Table 5
ble cause. Replace modules or repair as directed.
Table 5 -
3 Troubleshoot Using Ethernet I/O Interface Module Indicators
LED
Indication
Probable Cause
Corrective Action
ALM
Steady
Red LED
1. Module failure
1. Replace Ethernet I/O Interface
module
WYSD
ALM
Yellow LED
Lit
1. Loss of DS1 radio XMT input to
I/O Interface
Check presence of DS1 input to radio.
Is DS1 Present?
Yes - Replace Ethernet I/O module.
No - Check/repair cables to customer
interface.
2. I/O Interface cannot recover
clock, or there are errors on DS1
output of radio RCVR (RCV input
to I/O Interface).
Check XMTR end of hop for alarms.
Farend XMTR alarmed?
Yes - Troubleshoot farend XMTR
No -
1. Replace local alarmed I/O Inter-
face module.
2. Replace local radio RCVR module.
3. AIS has been detected on DS1
output of radio RCVR (RCV input
to I/O Interface). RCVR fault is
not in this radio.
Check upstream XMTR/hops for
alarms.
Содержание MDR-8000
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