PBX A - IAX Config
[dynamichost]
type=friend
host=dynamic
context=local   ; Default context to request for calls to peer
callerid="Some Host" <(256) 428-6011>
nat=yes
requirecalltoken=no

Extension
exten => _X.,1,Dial(IAX/dynamichost/${EXTEN})

---------------------- CLI ---------------------
Verbosity is at least 3
    -- Executing [182927041360@airstar:1] Dial("SIP/test-00000004", "iax2/dynamichost/182927041360") in new stack
[2010-05-06 11:43:42] DEBUG[10590]: chan_iax2.c:4000 create_addr: prepending 100 to prefs
    -- Called dynamichost/182927041360
[2010-05-06 11:43:42] WARNING[10258]: chan_iax2.c:9189 socket_process: Call rejected by 201.229.221.53: No such context/extension
    -- Hungup 'IAX2/dynamichost-1430'
  == Everyone is busy/congested at this time (1:0/0/1)


PBX B -IAX Config
register => dynamichost@69.59.158.114

[dynamichost]
type=friend
host=dynamic
context=local   ; Default context to request for calls to peer
callerid="Some Host" <(256) 428-6011>
nat=yes
requirecalltoken=no

Extension
[local]
exten => _X.,1,dial(ZAP/g1/${EXTEN})