I have a snom 300 in my home office, works fine. The cordless home phone is connected to an IAXy, and also works fine. Except. I found out that the IAXy will not generate ringback tone (pretty lame, I think). So I have to set freepbx to generate ringback always on outbound calls, except that is not recommended due to various IVRs out there. So... I want to replace the IAXy with a PAP2T, but I'm not sure how to configure it. The configs I've found online have been for specific service providers. For one thing, I do NOT want the pap2t to do vertical service codes, since asterisk is providing that capability. Any clues much appreciated...