My partner changed the modem to a high speed this morning, every thing is fine except the two old phones in the house? They ring, you can answer, have dial tone, but won't dial out? They did with the other modem (this is all with comcast)
A service tech is coming out tomorrow (probably someone who's never "dialed a phone")
Any thoughts, or warnings?

A service tech is coming out tomorrow (probably someone who's never "dialed a phone")
Any thoughts, or warnings?
