

I use this.
I have Ms VoIP as my provider. $1 month per line and 1 cent per min.
I have a grand stream sip adapter… Configured with my providers info and my creds. Phone can plug into it. Works just fine. Plus you can use any sip client to connect to the same line from mobile or PC.
Also, my old house had pots lines in every room. I took my grand stream and wired it into the house, not a phone. So I can plug regular phones into any of the original outlets and it works as it directly connected to the grand stream. I have 4 regular phones all running over original wires into the grandstream using sip
It does. Or can just send the recorded message to your email as a .wav attachment.