Here are some notes for getting an IAX2 trunk going on Hams Over IP. There were no surprises getting outbound calling to work, but inbound was a different story. I hope this helps you. Give me a call on HOIP 101135

-------iax.conf

register => get from HOIP

; HH inbound calls are sent from HH to radio context
[radio]
type=user
disallow=all
allow=ulaw
allow=gsm
codecpriority=host
context=hoip-inbound
transfer=no

[hoip]
type=friend
username=NODENUMBER
secret=SECRET
context=hoip-inbound
qualify=yes
qualifyfreq=60
host= get from HOIP
dtmfmode=rfc2833
disallow=all
allow=ulaw
insecure=port,invite
requirecalltoken=no
permit=0.0.0.0/0.0.0.0
transfer=no
trunk=yes
callerid=HOIP <1234>


-------Extensions.conf

[hoip-inbound]
; HOIP inbound - calls are sent from HH using radio context, ext s
; radio stanza in iax.conf changes context to hh-inbound. Choose either of the two
; examples below for call routing, either the inbound test message or ring SIP extension.
;
; optional, send call to your ext instead of s
;exten => s,1,Noop(Fixing DID to 1234)
;exten => s,n,Goto(1234,1)

; example inbound test message
exten => s,1,Answer
exten => s,n,Wait(1)
exten => s,n,Playback(weasels-eaten-phonesys)
exten => s,n,Playback(goodbye)
exten => s,n,Hangup

; example inbound call route - ring SIP phone ext 400
exten => s,1,Dial(SIP/400,15)
exten => s,n,Hangup


[hoip-outbound]
exten => _*9X.,1,Set(CALLERID(num)="1234")          ; Dial *9 + HOIP extension
same => n,Progress()
same => n,Set(CALLERID(name)="Hams over IP")
same => n,Dial(IAX2/hoip/${EXTEN:2})
same => n,Hangup()