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Chapter 5
Troubleshooting
Overview
The Model 560 ONT has several built in diagnostics functions which assist the installer in
determining the nature of most abnormal conditions.
This chapter details these diagnostic routines and provides a table to assist the installer in
troubleshooting.
Theory of Diagnostic Operation
When power is first applied to the ONT, the LEDs located on the MEM will indicate the
status of each component within the unit as it goes through its start-up routine.
PO
WER
PON HEA
LT
H
TE
L O
FF H
O
OK
BA
TTE
RY
PRESEN
T
VIDEO AGC
PRESENT
PRESENT
ST
AT
U
S
ST
AT
US
PO
RT 1
LI
NK 1
PO
RT 1
PO
RT 2
LI
NK 2
PO
RT 2
PO
RT 3
LI
NK 3
PO
RT 4
LI
NK 4
EXPANSION1
EXPANSION2 ETHERNET DATA
Video Signal Presen t
PRO
C
ESSO
R HEA
LTH
Battery Indicator
Telephone O ff-Hook
PON Health
Processor Health
Power Indicator
Expansion Module Status
Expansion Module Status
Ethernet Port Status
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