Procedures for Troubleshooting the Model 3124
49
Model 3124 User Manual
5 • Troubleshooting
Troubleshoot Model 3124 Power-Up Problems
Problem indication:
• the SYS LED on the front panel is not lit even though the DSLAM is powered up
• alarm that indicates a system power up problem
• subscribers connected to the DSLAM do not have DSL service; POTS service is ok
Procedure:
1.
Check that the power cord is connected to thepower socket on the front panel, and the other end of the
cord is connected to a power outlet.
2.
Check that the power feeds are connected to the DSLAM, and that power is present on the two power
feeds with correct polarity.
3.
Replace the Model 3124.
4.
Contact your provider.
Troubleshoot ADSLx Service Problems
Problem indication:
No ADSLx service to the affected subscribers (POTS service is ok).
Procedure:
1.
If all subscribers connected to the DSLAM are affected, and the SYS LED on the front panel is not lit,
check the both end of power cords:
– if one of the power cords is not connected, power up the DSLAM by plugging the power cord to the
power socket/power outlet.
– if the power cords are both connected, see
“Troubleshoot Model 3124 Power-Up Problems”
on page 49
to troubleshoot the DSLAM for power-up problem.
2.
If all subscribers are affected, check the SYS LED on the front panel; if it is red, replace the DSLAM.
3.
If only some subscribers are affected, identify the ports that have problems. Check that the subscribers are
connected to the line interfaces properly.
4.
Contact your provider.
Troubleshoot POTS Service Problems
Problem indication:
No POTS service to the affected subscribers (ADSLx service is ok).
Procedure:
1.
Check the connection of the POTS lines at the POTS connector for the DSLAM.
2.
Use a bridging connector to couple the POTS and subscriber lines. If this solves the problem, replace the
DSLAM.
3.
Check the condition of the POTS lines and connectors.
