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Today I received the modem from Cox and began installing the digital phone service. I've had a lot of trouble with it.
Presently, the modem Tel1 light is blinking with everything connected. When I remove the phone cord, the Tel1 light turns on solid. I am getting a busy signal with the cord plugged in. At one point I was able to make a call to my cell phone to capture the number. When I hung up, the cell phone kept ringing and proceeded to leave a 23 second voicemail of nothing. I've texted support twice and was told I needed to pay $55 for a technician to come over to my house. I tried calling from my cell phone to my new house phone but it says that the number is busy. It didn't even ring. I've spent about 5 hours trying to figure this out and other than buying a new wireless phone I'm out of ideas. I've reset modems, unplugged cables, and restarted phones more times than I can count.
Have you tried connecting the phone directly into Tel1? Could be internal phone wiring problem in your house.