Re: [Freeswitch-users] Unable to TXFAX, but receiving is OK. Always result (49)

Faxing is a B to try and get it to work reliably over VOIP. I have added a troubleshooting section at: http://wiki.freeswitch.com/wiki/Mod_spandsp#Troubleshooting with what I have found. It may help to track down the problem. ~mitch