Hello William, I'm interested in this too.
As far as I know the only way is to to patch the mod_sofia.
 
Good luck!

2011/11/21 William Alianto <william@xofap.com>
Hi,

I'm looking for a way to manipulate the SIP INVITE message. Currently my
SIP server sending 622X to call to provider. But the provider only
expect 2X from the invite, which cause the call won't be recognized. Is
there any string on diaplan I can add to adjust the invite message, so
the provider recognize the call?

--
Regards,

William


_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
http://www.freeswitch.org
http://wiki.freeswitch.org
http://www.cluecon.com

FreeSWITCH-users mailing list
FreeSWITCH-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org