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3.0 Trouble Shooting

Some things that can cause inside wire problems, (and you'd probably notice them on voice calls as well) are:
  • poor splices or taps
  • loose connections to outlets anywhere in the house
  • corrosion
  • abuse from furniture, pets, etc.
  • mis-wired connections
Any grounding will cause a problem (you'd hear a bad hum).

Other devices (fax machine, telephones, answering machines, etc.) can also cause a problem.

The line cord you use to connect the modem to the phone jack can also be a problem.

If the phone wiring in the walls is routed parallel (alongside) electrical wiring, this is almost a certain cause of poor lines. Even running a phone wire alongside an electrical wire for a short distance of 5 or 10 feet can make a huge difference in the potential performance of your DSL line. Ensure that telephone wiring is run AWAY from electrical wires, and if a crossing between the two is necessary, then do so at right angles.

Feedback received on this FAQ entry:
  • Issues may be at the webserver end at Sympat - I typically call 310-7873 and ask for a re-set. This generally clears up the speed issue, however much a PITA it is. Thanks.

    2008-11-09 09:52:10 (siljaline See Profile)

by KeysCapt See Profile edited by MacGyver See Profile
last modified: 2004-10-30 21:46:38

Here are some more steps you can take to check and isolate any inside problems:
Try a different line cord from the modem to the phone jack.

Unplug all other phone devices on the line. If performance changes, plug them back in one by one to isolate the problem. To verify it is a particular device and not the jack or the wire to the jack, plug the problem device into another phone jack, and check its line cord.

In some cases, EMI (electro-magnetic interference) may make its way into your phone wiring. Sometimes it's as simple as re-routing the line cord from your modem to the jack.

by KeysCapt See Profile

Testing Your Phone Service at the NID (Network Interface Device)

Schematic and picture by Andy Houtz

NOTE: Your demarc may look different from the pictured model, however the purpose of the demarc is the same.

  • Unscrew the Network Interface cover at the Customer Access point with a screwdriver and open.
  • Disconnect modular plug from test jack. If you have more than one line, select the test jack for the line that is causing the problem. This disconnects your inside wiring from phone company's line.
  • Wait one (1) minute, then insert plug from a telephone set you know is working. You are now plugged directly into the phone company line.
  • Try the telephone. If problem still exists, it is in phone company's lines. Contact your phone company repair service.
  • If problem is gone, you have trouble on your inside wiring, equipment, jacks or remaining telephone sets. Contact your phone company, a contractor or someone else, or make the repairs yourself.
  • Once you have finished your test, disconnect your testing telephone and securely re-insert the original modular plug. Close the cover and screw the fastener down until the cover is snug and tight.

If your NID/demarc does not have jacks inside of it, you can temporarily connect a baseboard wall jack with a short piece of wire to the terminals inside, and connect your modem that way.

by KeysCapt See Profile edited by MacGyver See Profile
last modified: 2005-01-16 10:39:04


by MacGyver See Profile
last modified: 2008-01-29 20:29:35