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ADCP-RG-61-124-09
E1 Quad FLC Module
Table 39.
Alarm Condition
LED Status
Loss of E1 line input signal.
(Signal not present on either
Working or Protect System)
E1 LOS (red)
Protect System Alarms
Alarm
Remarks
No Alarms, includes not sending a Remote alarm
signal. Option switch SW2 position 2 OFF.
E1 LOS (red)
MAJOR (red)
MINOR (yellow)
Major or
Minor
Alarms, includes sending a Remote alarm Signal.
With option switch SW2 position 2 ON and
position 1 OFF = MAJOR LED and major alarm.
Position 1 ON = MINOR LED and Minor alarm.
Service does not transfer to Protect System. AIS
sent on E1 drop.
E1 line receiver failure
(Signal not present on either
Working or Protect System)
E1 LOS (red)
MAJOR (red)
MINOR (yellow)
Major
Minor
If E1 failure is on Working System, service will
transfer to Protect System.
To send a Remote alarm and initiate a MAJOR or
MINOR LED and alarm, option switch SW2
position 2 ON and position 1 ON = MINOR LED and
Minor alarm. (To provide an alarm for E1 receiver
failure, it is recommended position 1 be ON for a
MINOR LED and Alarm.) Position 1 OFF = MAJOR
LED and major alarm.
Loss of E1 output signal
MOD FAIL (red)
MINOR (yellow)
Minor
If E1 output failure is on Working System, service
will transfer to Protect System.
Loss of optical input signal
OPT LOS/OOF (yellow)
MINOR (yellow)
Minor
Indicates loss of incoming optical signal.
RMT/HSKP LED is off even if the Far End is in alarm.
Optical signal Out-of-Frame
OPT/LOS/OOF (red)
MINOR (yellow)
Minor
Indicates module is receiving faulty optical signal
and is not able to frame it.
Laser degrade
MOD FAIL (red)
MINOR (yellow)
Minor
Indicates module laser degradation.
Does not initiate transfer to the Protect System.
BER PROT SW threshold
exceeded
BER/MOD FAIL (yellow)
MINOR (yellow)
Minor
Optical link exceeded BER APS threshold level.
Switch to protection occurs.
BER MIN ALM threshold
exceeded
BER/MOD FAIL (yellow)
MINOR (yellow)
Minor
Optical link exceeded BER Minor alarm threshold
level. No switch to Protect System.
Controller failure
MOD FAIL (red)
MINOR (yellow)
Minor
Indicates internal module failure.
Does not initiate a Remote alarm signal, but the Far
End module illuminates MOD FAIL to indicate loss of
communications with Near End.
Remote alarm
RMT/HSKP
Remote
Indicates Remote alarm.
E1 line loopback operated
LOS/LBPBK (yellow)
MINOR (yellow)
Minor
Indicates the E1 line(s) that are in a loopback mode
and are looped at the Far End.
Automatic switch to Protect
System
ONLINE/STDBY (yellow)
MINOR (yellow)
Minor
(Working System – both ends) Indicates E1 service
switched to Protect System.
ONLINE/STDBY (green)
APS lockout
APS LKOUT (red)
MINOR (yellow)
(Protect System – both ends) Indicates Protect
System is providing the E1 service.
Whatever caused the automatic switch to the Protect
System to occur, activates the appropriate alarms as
described in this table.
Minor
After third APS switch within a 24 hour period.
Continued
Fiber Loop Converter Reference Guide
September 20, 2002
63