User Manual

133
MN024-08
TFLN troubleshooting
In case a TFLN master optical TRX has any problem, this will be easily
revealed through LEDs on its front panels otherwise troubleshooting can be
carried out through LMT or supervision system.
LEDs on TFLN front panel detect not only failures of the TFLN board itself but
they also reveals malfunctions located on related remote units.
ALARM CODE
(TSUN
description)
ALARM
DESCRIPTION
ACTIVE
LED
SUPERVISION
PRIORITY
LEVEL
ACTION
RECOMMENDED
RELÉ
PRIORITY
LEVEL
(subrack)
RX1 optical power
fail
The optical power
received on the UL1 is
too low and can’t no
more be compensated
RED
(LED1)
CRITICAL
Check the UL1 fibre
and the remote unit
laser status
MAJOR
RX1 AGC out of
range
The optical power
received is under the
allowed 3dB optical
loss but it can be
compensated
NONE MINOR
Clean optical
connectors
MINOR
RX2 optical power
fail
The optical power
received on the UL2 is
too low and can’t no
more be compensated
RED
(LED2)
CRITICAL
Check the UL2 fibre
and the remote unit
laser status
MAJOR
RX2 AGC out of
range
The optical power
received is under the
allowed 3dB optical
loss but it can be
compensated
NONE MINOR
Clean optical
connectors
MINOR
RX3 optical power
fail
The optical power
received on the UL3 is
too low and can’t no
more be compensated
RED
(LED3)
CRITICAL
Check the UL3 fibre
and the remote unit
laser status
MAJOR
RX3 AGC out of
range
The optical power
received is under the
allowed 3dB optical
loss but it can be
compensated
NONE MINOR
Clean optical
connectors
MINOR
RX4 optical power
fail
The optical power
received on the UL4 is
too low and can’t no
more be compensated
RED
(LED4)
CRITICAL
Check the UL4 fibre
and the remote unit
laser status
MAJOR
RX4 AGC out of
range
The optical power
received is under the
allowed 3dB optical
loss but it can be
compensated
NONE MINOR
Clean optical
connectors
MINOR
Major Remote
Unit 1
Alarm from RU1
RED
(LED1)
-
Check remote unit
status
MAJOR
Major Remote
Unit 2
Alarm from RU2
RED
(LED2)
-
Check remote unit
status
MAJOR
Major Remote
Unit 3
Alarm from RU3
RED
(LED3)
-
Check remote unit
status
MAJOR
Major Remote
Unit 4
Alarm from RU4
RED
(LED4)
-
Check remote unit
status
MAJOR
DL laser alarm
A fault occurs on the
DL laser
RED (┌┘) MAJOR Return the unit MAJOR
UL RF alarm
HW failure on the UL
RF section
RED (┌┘) MAJOR Return the unit MAJOR
DL RF alarm
HW failure on the DL
RF section
RED (┌┘) CRITICAL Return the unit MAJOR
Board failure
alarm
General failure on
board
RED (┌┘) MAJOR Return the unit MAJOR
Temperature
alarm
Over-temperature
alarm
NONE MINOR
Check ventilation
and environment
MINOR
TFLN
Tab. 5.6: TFLN alarm description