Axvoice Discussion forum

I have a question how to make fax machine work after switched from hard line phone to a VoIP Phone Service?

Sometimes it has to do with the codec being used by your VOIP provider. G711 is the standard used by Hardlines and most VOIP over lan. G729, which some providers use, is a different algorithm and has a different capture rate so that it can use less bandwidth over WAN connections and so it captures less information..thus some fax data may be lost. You may check with your VOIP provider to see what codec you are using and if this is configurable