I think 3pcc only enables interoperability with inbound empty INVITEs, but I could be wrong.

Just curious - I understand the motivation behind using empty INVITEs, but why is it a requirement for your far-end user agent?



On Thu, Apr 14, 2016 at 3:44 AM, amani mansour <amani.mansour2@gmail.com> wrote:
Hi all,
I need to make a call from Fs to a sip client, The INVITE must be without SDP ,is there any one can help me please .
I have enabled 3pcc 
FS------------------------(INVITE without SDP)---------------------------->phone 

originate  {?????}sofia/gateway/mygateway/extension  &park()
or 
modifie any thing in XML file 
thanks 

Best regards 
Amani

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