[SIP Beyond VoIP] SylkServer 3PCC - INVITE without SDP
Adrian Georgescu
ag at ag-projects.com
Wed Apr 6 17:04:21 CEST 2022
SIP Simple Client SDK (which uses PJSIP underneath)
> On 6 Apr 2022, at 12:02, Ivan Ribakov <i.ribakov at zaleos.net> wrote:
>
> > The underlying library
>
> Which one is that? PJSIP? I found some indications (https://trac.pjsip.org/repos/ticket/1785 <https://trac.pjsip.org/repos/ticket/1785>) that it might be supporting it, although I'm not sure if the support is at the right API level that SylkServer/SipSimple SDK require.
>
> On Wed, 6 Apr 2022 at 16:52, Adrian Georgescu <ag at ag-projects.com <mailto:ag at ag-projects.com>> wrote:
> The underlying library does support handling initial INVITE with no SDP but SylkServer itself does not. It could do it with extra development.
>
> Regards,
> Adrian
>
>
>> On 6 Apr 2022, at 11:49, Ivan Ribakov <i.ribakov at zaleos.net <mailto:i.ribakov at zaleos.net>> wrote:
>>
>> Does SylkServer support 3PCC Flow I as described in https://datatracker.ietf.org/doc/html/rfc3725#section-4.1 <https://datatracker.ietf.org/doc/html/rfc3725#section-4.1> . I'm looking for a way to force SylkServer to generate SDP offer so that I can use it to dial-out to conference participants. I've tried sending INVITE with no body but got "Not Acceptable here" error response in return.
>>
>> Regards,
>> Ivan
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