I am using a device that eliminates a land line and uses my cell phone instead (Doc-N-Talk). I have discovered that my telephone system is fully dtmf (digital) compliant. This causes a big problem with the Analog modem (very old technology) inside my VIP622. (who would have thought analog modem in a digital receiver ). All of my cheap old 2 line phones still work fine on this new system. I even can get a connection (thru the VIP622 diagonistics) as well as receive caller id's. I do know that the VIP622 will dial out and dish network's computer answers the call and sends a modem handshake, however my VIP622 does not hear the handshake very well apparently and I get a 'dial out failure'. I even bought a 2-line DSL filter and still 'failure'. Surely I am not the only person in the whole world who is trying to talk to the Vip622 using digital technology. Does anyone have any suggestions other than spending $27 a month on an antiquated land line?