On Sun, Feb 26, 2023 at 6:00 PM Mike Stein <[email protected]> wrote: > > Most VoiP systems don't play very well with old tone-encoded protocols like > modems or FAX machines, but if you have a POTS line or can get it to work > with VoiP then most modems will let you dial out with either TT or pulse and > also answer incoming calls.
I have very good results with my small "phone network" at home using Analog to VOIP adapters and an asterisk server. The trick is to disable the echo cancelling option on the ATA port setup and never use a too low bandwidth encoding. I've been able to have reliable connections up to 9600 bps. Actually it could be even capable of higher rates, but I've never had any reason to try them so far. The last time I've searched, there was only one ATA model that supported pulse dial (the old rotary dial encoders), but that's not a big problem because I can use a smartphone as the tone dial source if I'm using an old phone. HTH Frank IZ8DWF
