Hi Bob
Option #1
- Buy a cordless phone with a "Range Extender". Not my favorite method but I've seen it work pretty good at almost double that distance.
http://www.ebay.com/itm/Panasonic-K...798?pt=LH_DefaultDomain_0&hash=item3ce1248946
Option #2
- And this is what I would do - if in fact the conduit is there and has not been run over by a plow, go by Home Dipo and grab 2 or 3 "Laborers" and repull new lines. Run in a new 4-pair plus a Cat-6 cable and you should be good into the next millennium.
Things to think about when pulling through old conduit
1. "If you can get air through it - you can get wire through it". Start by using your compressor to blow through the conduit. This will clear out water, dirt, and debris.
2. You can use the existing wires to pull in 1/8" rope of as we call it "Jet-Line" as you pull out the old wires by tying the line on before you pull the wires out.
3. Use a generous amount of "Boy-Butter" as we lovingly call it when working with fresh apprentices, (pulling soap/lubricant) by tying a small rag soaked in Boy-Butter 2 ft. ahead of the new wire coming in. This will swab your conduit clean ahead of the wires coming in as you pull it.
Now you do realize 99% of static in phone lines is because the ground connection at the "D-mark" point, (where your home lines connect to the Telco in a little 4"x6" box outside your house) has gone bad. It will be connected most likely to the same ground rod that serves as the ground connection for your main panel
Anymore questions and I'm sure the guys down in the electrical forum would be glad to share all their tips and tricks