[SIPForum-discussion] Update and re-INVITE

[Stephen James]

 The session refers to the media session negotiated with SDP, which both the re-INVITE and the UPDATE can modify. The dialog relates to the from / to / Route and Contact values which only the re-INVITE can modify. For example a re-INVITE can change the contact address for a Dialog while an UPDATE cannot.

Sent from my iPad

> On Oct 21, 2014, at 7:03 AM, asif hykadi mushtaq <asif.mushtaq at live.com> wrote:
> 
> Its mentioned in RFC that 
> - "re-INVITE has an impact on the state of the dialog, in addition to the session."
> - "Update can be sent by a UA within a dialog (early or confirmed) to update session parameters without impacting the dialog state itself"
> 
> 
> Wanted to understand whats mean by state of dialog and state of session.
> 
> 
> Regards,
> Asif
> .e
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