Re: KX-T: Door Phone Problems

[SurfSideSound]

Double up your pairs if the doorphone is quite a bit away from the ksu.  I have a doorphone about 800' from the ksu, and I've got 3 pairs of 24gauge wire doubled up to get over the ohms per foot issue.  Also check you wiring for chafing and shorting.  Put an ohm meter on the open pairs and see if you get any reading other than infinite. If you do, you have bad pairs.  Again short the pairs, and see what reading you get, it should be low ohms, or as close to a short as possible. Anything out of the normal means bad wire.
  It sounds to me something is triggering the doorphone circuit, and you having to reset of course clears the problem.  This trigger may be bad wiring or electrical surge or a static discharge issue.  If need be, run 2-conductor shielded wire like west penn 292 or similar, and ground the drain wire at the ksu. Do not connect the drain wire at the doorphone.  This may shield the run from any RF interference.  Check to see if your run near any electrical run, romex, etc.  The emf may bleed over, especially if the AC wiring is a switched leg to a lamp, or feeds an air conditioner.  The surge current on a heat pump can create very large magnetic fields and cause triggered type circuits to react.  Since the doorphone is such, be aware of these things.  Seperate by at least 6 onches from any AC circuit, and if your wiring must cross AC wiring, do it at 90 degree angles. This lessens the effect of the mag field.

So endeth the lesson.

Good luck

Steve Martin
Surf Side Sound, Inc.