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Troubleshooting LTPS-UM-8013-03
36 August 30, 2002 D3LX CO and RMT Modules
TROUBLESHOOTING
Before the system tests are started, the fiber-optic network and DS3 lines at both ends must be connected. The
STATUS and DS3 ONLINE LEDs should be illuminated green.
Table 8 is intended as an aid in localizing trouble. If trouble is encountered with the operation of the D3LX, verify
that all installer connections are correct and that the options are configured properly. If technical assistance is
required, refer to “Appendix C - Product Support” on page 41. ADC strongly recommends that no internal
(component level) repairs be attempted on the module. The only field service should be a fuse or module
replacement. Any unauthorized adjustments or repairs may void the unit’s warranty.
Table 8. Troubleshooting
Replace
D3LX.
No
Ye s
Check and correct
fiber problems, (i.e.,
back reflections, etc.).
Reinsert .D3LX
D3LX Opt
Fail/BER
LED red or
yellow?
No
D3LX APS
Lockout/
Force
LED red?
No
Ye s
Is optical
receive level
within specs?
Problem
resolved?
No
Call ADC.
Ye s
STOP!
Ye s
Correct optical receive
level (i.e., clean
connectors, remove
attenuators, etc.).
No
Press Reset
on . IsD3LX
condition still
present?
Determine reason for
lockout (i.e., online card
removed, borderline
fiber levels, etc.).Correct
condition.
Ye s
STOP!
Reseat
D3LX.
Ye s
Status LED
still red?
Ye s
No
STOP!
D3LX
Status
LED red?
Press Reset
on D3LX.
Status LED
green?
Ye s
STOP!
No
Ye s
No
STOP!
Opt Fail/
BER LED
still on?
No
STOP!
No
Ye s
D3LX
Remote
LED
yellow?
Press DISP RMT
on APU.
STOP!
D3LX APS
Lockout/
Force LED
yellow?
Service has been manually switched
for maintenance purposes. May be
cleared through the Craft Interface or
Reset button on front panel.D3LX
Other LEDs may light to
indicate the cause of remote
alarm. Go to the Craft
Interface Active Alarms
display to determine cause.
STOP!
No
STOP!
Ye s