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IES-2500 User’s Guide
9-2 Hardware Troubleshooting
9.3 A DSL LED Does Not Turn On
The DSL LEDs show the operational status of the DSL port connections If a DSL LED is off, it means the link to
the DSL modem/router is down.
Table 9-3 DSL LED Troubleshooting
STEP CORRECTIVE ACTION
1 Ensure that all hardware connections are properly made (including the modem/router on the subscriber’s
side) and that all devices are turned on.
2 Make sure the DSL port is enabled (refer to the line card’s User’s Guide ).
3 Check the DSL line pin assignments shown in the appendix.
4 Check the telephone wire connections between the DSL modem/router and the MDF(s).
5 Check the telephone wire and connections between the MDF(s) and DSL port(s).
6 Check the telephone wire mapping on the MDF(s) – see the chapter on MDF connections.
7 Make sure the in-house wiring works and is connected properly to the MDFs.
8 Make sure the line speed is consistent between the IES-2500 side and the CPE (Customer Premise
Equipment) side.
9 If your line quality is low, you may need to select a slower line speed for both the IES-2500 and CPE
sides. Refer to the
User’s Guide .
9.4 No Voice on an ADSL or VDSL Connection
The ADSL and VDSL line and splitter cards allow the telephone wiring used for ADSL and VDSL connections to
also simultaneously carry normal voice conversations.
Table 9-4 Voice Troubleshooting
STEP CORRECTIVE ACTION
1 Make sure the subscriber has a POTS splitter properly installed.
2 Check the telephone wire connections between the subscriber and the MDF(s).
3 Check the telephone wire and connections between the MDF(s) and USER port(s). Refer to the pin
assignments shown in the appendix.
4 Check the telephone wire and connections between the MDF(s) and the CO port(s). Check the telephone
wire mapping on the MDF(s).
5 Check the connection from the MDF(s) to the PBX or the telephone company PSTN or ISDN switch.
6 Make sure the in-house wiring works and is connected properly.
7 Repeat the steps above using a different DSL port.