just followed the instructions on line and have it running with 4 time warner digital lines. only issue is that i can't get it to work with 4 trunks and have to use all 4 DID on one trunk. only 1 trunk would ring.

This is an easy to use device, which with IP infrastructure allows you the use of the PSTN (public telephony) in different remote locations as if they were at the same location.------ ++ Easy to set up and use.----- + Good manufacturer's technical support.