Server 1:
iax.conf
[vitoria]
username=vitoria
secret=secret
type=friend
host=dynamic
context=internacional
disallow=all
allow=gsm
;allow=alaw
;allow=ulaw


extensions.conf
[globals]
TRUNKVIT=IAX2/central@vitoria

;Ramais VoIP Vitoria/ES
exten => _8[89]X,1,Answer
exten => _8[89]X,2,Dial(${TRUNKVIT}/${EXTEN},40,TtrwW)
exten => _8[89]X,3,Hangup




Server 2:
[central]
; Peer de conexao Central (Floripa)
username=central
secret=secret
type=friend
qualify=yes
host=dynamic
context=ramais
disallow=all
allow=gsm
;allow=alaw
;allow=ulaw


extensions.conf
[globals]
TRUNKCTL=IAX2/vitoria@central

[ramais-central]
exten => _[47]XX,1,Dial(${TRUNKCTL}/${EXTEN},40,Ttr)
exten => _[47]XX,2,Hangup

exten => _8[1-7]X,1,Dial(${TRUNKCTL}/${EXTEN},40,Ttr)
exten => _8[1-7]X,2,Hangup