Problem indication: No VDSL/ADSLx service to the affected subscribers (POTS service is ok).
1 If all subscribers connected to the DSLAM are affected, and the SYS LED on the front panel is
not lit, check the power source.
• If the power source is not connected properly, power up the DSLAM by fixing the power
source.
• If the power source is correct, follow Procedure 3-1 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 Check the GBE1/GBE2 LED (if SFP interface is activated); if it is not lit, follow Procedure 3-
3 to troubleshoot the DSLAM for fiber optics problems.
4 If only some subscribers are affected, identify the ports that have problems. Check that the
subscribers are connected to the line interfaces properly.
5 Contact your provider.
Problem indication: No POTS service to the affected subscribers (VDSL/ADSLx service is ok).
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.
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