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18
2.7 Performing Loop Back Test
To perform a loop back test between a local MC and a remote MC
connected by a fiber cable, the steps are:
1.
Press and hold Loop back test button of the local MC.
2.
Check RTP LINK LED. It blinks to indicate the MC is in loop back
test mode.
3.
Check RTP 100M LED. It is ON to indicate a completion of the
loop back test and OFF during test.
4.
Check RTP FDX LED for the test result. It is ON to indicate a
TEST PASS and OFF for TEST FAIL.
5.
Release Loop back test button. RTP LINK/100M/FDX LEDs are
back to display remote TP port status.
Summary of Loop Back Test LEDs
LED
Status
Interpretation
RTP LINK
Blink
The MC is in Loop Back Test mode
RTP 100M
On
Loop back test complete
Off
Loop back test in operation
RTP FDX
On
Loop back test OK
Off
Loop back test fail
