NPT-1020 Installation and Maintenance Manual
Maintenance
ECI Telecom Ltd. Proprietary
7-9
No. Symptoms
Probable cause
Corrective actions
4
Left green LED in the
PORT 1-PORT 8 RJ-45 off
Link down or defective
indicator
No trail on the corresponding Ethernet
ports indicates a normal state.
If there are trails on the corresponding
Ethernet ports, check whether there are
SSF or CSF alarms in the corresponding
Ethernet trails. If yes, try to find the reason
for the SSF or CSF problems and solve
them, and check the link status again.
Make sure the cable connected to the
corresponding port is not damaged.
Connect the cable to an Ethernet analyzer.
If a normal signal is detected, the indicator
is defective or the port is unavailable.
Replace the NPT-1020 unit.
5
Right orange LED in the
PORT 1-PORT 8 RJ-45 off
10/100 Mbps link or
defective indicator
Check the port attributes in the LCT-APT. If
the speed status is 10/100 Mbps, it is in
normal state.
If the speed status in the LCT-APT is 10/100
Mbps, the NPT-1020 or indicator is
defective. Replace the NPT-1020 unit.
Table
7-5: General troubleshooting procedures for optical transceiver plug-ins
No. Symptom
Probable cause
Corrective actions
1
Green transceiver Laser
On indicator off
SFP module damage
On the LCT-APT, if the SFP type cannot be
successfully obtained, the IDPROM of the
SFP module may be damaged. Replace the
module.
If the SFP type information is consistent
with the expected SFP type, force the laser
on through the LCT-APT. The laser on
indicator should be on. If not, the SFP
module or the optical module is damaged.
Replace the damaged module.
Incorrect configuration
On the LCT-APT, check whether there is an
SFP-type-mismatch alarm in the
corresponding optical interface.
If yes, check the expected SFP type first.
Correct it if it is not correct.
Then, check the SFP module type. If it is
not the same as the expected SFP type,
replace the SFP module with the proper
type.
