I have an Vonage VoIP system using the Motorola ATA device. When I hooked it up, I connected four home lines into a digital block, which the ATA was connect to. Everything was perfect. Today, I hooked up the other four lines to the digital block and boom, the phone quit working. Why does a Pots phone drive 8 lines whereas the ATA is limited to 3-5? Is there any way around this?