Dear jcasaravilla
I also use Elastix 2, can you explain me how to set up the system:
1.Two External extensions(WAN):Extension 100(for example)
dtmfmode-rfc2833/info
canreinvite-yes/no/nonat
nat-yes/no
2.General Settings: Asterisk Dial command options- rt or r only
3.IN FreePBX: Asrerisk SIP Setting: NAT-yes/no/never/route
Reinvite Behavior-yes/no/nonat/update
** My system behind a router(NAT).
Note: If you use "info" you can't dial DTMF in SIP, which means you can't enter voice mail password and IVR calls.

Regards

sharabig

Hello everyone
After many attempts ,these are the settings:
1.Two External extensions(WAN):Extension 100(for example)
dtmfmode-info
canreinvite-yes
nat-yes
2.General Settings: Asterisk Dial command options- r only
3.IN FreePBX: Asrerisk SIP Setting: NAT-yes
Reinvite Behavior-yes
** My system behind a router(NAT).
Note: If you use "info" you can't dial DTMF in SIP, which means you can't enter voice mail password and IVR calls.
Very important
X-Lite (Softphone) don't works with INFO only RFC2833, YEALINK (T28) Auto+Sip INFO
Two External Softphone (X-lite)need to set in the Account Setting in the Presence tab
Mode:Disabled ,no Peer-to-Peer (Still possible to work with rfc2833)

Sharabig,

A big thank you for posting your settings. Not that I have a use for it personally at the moment, but for anyone else looking to do the same thing, it will be invaluable.

There are too many dead end posts, where the question is asked, they resolve the question without posting the answer...so again thanks for your post(s)

Regards

Bob

Thanks to all who contributed - you need to know that you have helped me greatly