ADC D3LXC-FCA100 Manuel D’Utilisation

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. 

 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 

. 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. 

Replace
D3LX.

No

Yes

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

Yes

Is optical
receive level
within specs?

Problem
resolved?

No

Call ADC.

Yes

STOP!

Yes

Correct optical receive
level (i.e., clean
connectors, remove
attenuators, etc.).

No

Press Reset
on

. Is

D3LX

condition still
present?

Determine reason for
lockout (i.e., online card
removed, borderline
fiber levels, etc.). Correct
condition.

Yes

STOP!

Reseat
D3LX.

Yes

Status LED
still red?

Yes

No

STOP!

D3LX
Status
LED red?

Press Reset
on D3LX.

Status LED
green?

Yes

STOP!

No

Yes

No

STOP!

Opt Fail/
BER LED
still on?

No

STOP!

No

Yes

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!

Yes