I have 4 trunks setup on my pbx, 3 regestring using regestration string and one Broadvox registring by IP. First 3 trunks work with no problem but Broadvox ever one way audio or fast bussy. I checked my sip_nat.conf and it looks like evrything the way it should be: nat=yes externip= my externalip localnet= my pocal network I called broadvox and they did a trace and it looks like my pbx sends out its local ip in sip invite message?????? How could this be? Evrything was working correctly before fryday and nothing was changed.