[SIPForum-discussion] INVITE request without SDP

[Hasini Gunasinghe]

Hi All,

Could anyone please tell me what are the practical situations that a UA
(such as a SIP phone) wants to send an INVITE request with out SDP offer in
the body of the message?

Only scenario i can think of is: when clients want to know the far end full
list of media capabilities before they send their own *offer. *Is there any
other situations too?

Is it a must for a SIP phone application to have the ability of initiating a
call without SDP in the INVITE?

I tried to use the sip stack provided with RTC Client API, to send an INVITE
without SDP, but could not find a way to achieve that. If anyone of you have
been able to do that before please do let me know too.

Thank you.
regards,
Hasini.
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