On the Grandstream - Why Can't You Do This?

[BillG49]

This will work, but first you must disconnect your "in-house" wiring from the old incoming pots (plain old telephone service) line. Even though you no longer have pots service, you must disconnect the incoming wire for the in-house wiring to work with the voip feed.

[MarkTomlinson]

I do it. In fact, I have two VoIPo lines plugged into the four-wire lines in my house. This allows me to have one base unit for my home line and another for my home-office (see: http://www.wire-your-phones.com/).

[mobilelawyer]

Many thanks for the helpful tips. I had forgotten about my post, and just looked at all the responses this evening.

I am sure I can make it work, and I think that the problem may be a plethora of jacks that are still wired to the POTS line. I am going to playwith them for awhile before I requests an increase in voltage.

I shall report back after continuing the experiment!