I just setup our 3cx system, and everything seems to work perfectly with the exception of outgoing calls. Here's our setup: Grandstream 4104 connected to 2 PSTN lines 5 Linksys SPA942 phones Incoming calls work great, paging, voicemail etc. I've setup an outbound rule that has the grandstream in route 1, strip digits 1, nothing in prepend, and the Prefix is set to 9. I just get a fast busy when I try to dial out. The server activity log says "Normal call termination. Reason: Forbidden" I went throught the manual and configuration guides, I can't find anything wrong. Any suggestions?