ADC Telecommunications, Inc.
7
Table 3. FRL-842 Front Panel LEDs
LED
Color
State
Description
PWR
Green
On
FRL-842 power supply is normal
Flashing
FLL-812/FLL-814 is attempting to power-up the FRL-842
Off
FRL-842 is not receiving power or internal fault
LOOP 1 SYNC
Green
On
Loop 1 is in synchronization between the FLL-812/FLL-814 or Doubler
Unit
Flashing
Loop 1 is attempting to synchronize with the FLL-812/FLL-814 or Doubler
Unit
Off
Active FLL-812/FLL-814 or Doubler Unit is not detected
LOOP 1 MARGIN
Yellow
On
Loop 1 margin at the FRL-842 is equal to or below the provisioned
threshold level
Flashing
Loop 1 margin at the FLL-812/FLL-814 or Doubler Unit is equal to or
below the provisioned threshold level
Off
Loop 1 margin is above the provisioned threshold level
LOOP 2 SYNC
Green
On
Loop 2 is in synchronization between the FLL-812/FLL-814 or Doubler
Unit
Flashing
Loop 2 is attempting to synchronize with the FLL-812/FLL-814 or Doubler
Unit
Off
Active FLL-812/FLL-814 or Doubler Unit is not detected
LOOP 2 MARGIN
Yellow
On
Loop 2 margin at the FRL-842 is equal to or below the provisioned
threshold level
Flashing
Loop 2 margin at the FLL-812/FLL-814 or Doubler Unit is equal to or
below the provisioned threshold level
Off
Loop 2 margin is above the provisioned threshold level
TEST
Yellow
On
Test active
Off
Test not active
ALARM
Red
On
FRL-842 alarm condition exist
Flashing
FLL-812/FLL-814 alarm condition exist
Off
No alarm conditions exist
FAULT
Red
On
Fault in the FRL-842
Off
No fault is detected
