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How to Troubleshoot Wiring Problems on T5 DSL ports

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TitleHow to Troubleshoot Wiring Problems on T5 DSL ports
Objective
Troubleshoot T5 DSL wiring problems, such as Over-Current, Failed and Idle DSL Status messages.
Environment
  • T5 PowerBroadband Switch
  • TS-524
  • TS-0524
  • PBN
  • Private Broadband Networks
  • T5 Switch
  • TW-522
  • TW-511
  • TW-510
  • T5 Wi-Fi over VDSL2
Procedure
Equipment Required:
  • Punch-down Tools
  • RJ-11 cable
  • Known-Good TW-5XX wallplate
  • TW-5XX local power supply (optional, but recommended)

Summary: To identify where a potential wiring fault is located, you need to start in the phone closet/MDF on the T5 Data-Block and work your way back to the room, testing the TW-5XX connectivity at every IDF.  To provide accurate testing, you must disconnect the wires that run to the wallplate in the room before testing at the Data-Block and IDF blocks.
Important information:
  • The T5 switch shuts down the port when it detects a short in the wiring.  The status of the port will change to "Over-current", and if left in the over-current state, it will eventually change the status to "Failed".  Shorts can happen when using punch-down tools on the blocks, so it is recommended that you Disable the DSL port that you are working on prior to pulling/punching wires.
  • When you disable a DSL port, it automatically disables line-power.  When you enable a port, it does NOT automatically enable line-power.  However, you can simply enable line-power and that will automatically enable the port.  The reason for this logic is in the cases where a local power supply is in use on the wallplate and line-power needs to be disabled.
Procedure:
  1. Examine the blocks - look for corrosion or loose wires and clean those up first
  2. Disable the problematic DSL port on the T5 switch (This will automatically disable line-power). Command: int dslX shutdown  (Where "X" = the port number)
  3. Disconnect the cross-connect wires from the Data-Block that run to the House Block / Rooms
  4. Punch down an RJ-11 cable in the place where you disconnected the wires
  5. Connect a known-good TW-5XX wallplate to the RJ-11 cable
  6. Re-enable line-power for the DSL port (this will automatically re-enable the port). Command: int dslX line-power (Where "X" = the port number)
  7. Check the status of the port after 2-3 minutes. Command: sho int dsl status
  • If the port comes up and status is "Linked", disable the port, disconnect the RJ-11 cable and reconnect the house wires, then move to the closest IDF and repeat the same procedure, always removing the cross-connect wires that go to the Room. At this point, you have determined that the problem is in the wiring, not the T5 port.
  • If the port still shows over-current, check the punch-down of the RJ-11, check for problems on the block, such as shorts and corrosion, or try new Amphenol Cable.  Try removing the Amphenol cable from the Phone/DSL side of the T5. Disable and re-enable the port. If port is still in Over-Current with the Amphenol cable removed, the port on the T5 switch is bad,


 
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