I have configured an 8845 via TFTP and XML to register with my FusionPBX SIP server. I can receive incoming calls but when I press any digit on the pad in an attempt to make a call, I immediately get a fast busy signal. I suspect it has something to do with not having provided a dailplan.... Which I'm having trouble figuring out.
I have successfully used to update the firmware to sip8845_65.12-6-1-0001-668 and used TFTP to make the registration info available via TFTP. If anyone has any input on this, I would be all ears.
UPDATE: I just found that if I dial on-hook and start the call, the call goes through. It is just dialing into a dial-tone that causes this issue.