IAX2 Trunking between two servers

Asterisk Asterisk Support
1

I’ve configured two Asterisk Servers to be connected together via an IAX connection.
I’ve no trouble to connect them together and make calls, but I can’t manage to trunk(multiplex) the calls.

I only manage to have a one way trunk call.
What I mean is that for exemple when I make a call between two phones 1 and 2, each on a separate server, if 1 calls 2, I get the following result :
1 -> 2 : The uplink is not trunked, and the answer, downlink is trunked.

So that I’ve got half-trunked communication !

Has someone an idea to solve my problem?

2

post your iax conf files for us to look at.

3

Here’s the IAX configuration file, on the other server it’s the same, with the correct IP addresses, passwords and usernames.

; Informations générales
; ***********************************************************************
[general]
; Port et adresse d’entrée du lien IAX
bindport=4569
bindaddr=IP_ABRARACOURCIX

;iaxcompat=yes
;nochecksums=no
;amaflags=billing
language=fr
disallow=all
;allow=all
allow=ilbc
allow=g723.1
allow=g729
allow=gsm
;disallow=slin
;disallow=gsm
;disallow=alaw
;disallow=ulaw

; Buffer de gigue
jitterbuffer=yes
forcejitterbuffer=no
;dropcount=5
;maxjitterbuffer=100
;resyncthreshold=100
;maxexcessjitterbuffer=80
trunkfreq=30

; Enregistrement
;minregexpire=60
;maxregexpire=60

register => abraracourcix:XXXX@IP_CESAR

;authdebug=no
tos=lowdelay
autokill=yes
codecpriority=host

; Informations sur les utilisateurs
; ***********************************************************************
[guest]
type=user
context=default
callerid=“Guest IAX user”

; Serveur César
[cesar]
type=friend
context=appel_depuis_iax
username=cesar
auth=md5
secret=xxxxxxx
host=dynamic
defaultip=defaultIP_CESAR
canreinvite=yes
nat=yes
trunk=yes
notransfert=yes
jitterbuffer=yes
qualify=yes
sendani=yes

I’m using Asterisk 1.2.5 for information.

4

I found the mistake !

It comes from the fact that my serveur name cesar is not a DNS name in my Network. To solve the problem I replace cesar by its IP address

; Serveur César [cesar] type=friend context=appel_depuis_iax username=cesar auth=md5 secret=xxxxxxx host=dynamic defaultip=defaultIP_CESAR canreinvite=yes nat=yes trunk=yes notransfert=yes jitterbuffer=yes qualify=yes sendani=yes