Today, out of the blue, by home phone began to have problems with incoming calls. If you are calling the house, you will hear a partial ring, then lot's of static. Eventually the line will disconnect. If you are in the house and pick up the phone, after the initial partial ring, the call will connect and everytthing is fine; no problems with dialing out, either.

I connected a "good" phone to the outside test jack and all works fine, for incoming and outgoing calls. I then unplugged all inside phone jacks and phone electrical supplies, tried calling the home line and still received a partial ring, static and eventual disconnect.

Any sugesstions as to what might be the problem or what to do next?

Thanks in advance.