[SIPForum-discussion] INFO method

[Peter Macaulay]

Yes, you have now discovered the hole in the
SIP standard -- any and all proprietary extensions
are put into INFO.  So, if you implement INVITE,
ACK, BYE, CANCEL, OPTIONS and REGISTER -- call
yourself "SIP compliant", then load up private
messages for feature enhancements with INFO between
your proprietary instruments.

The 17th SIPIT was just completed and we still
don't have any approval process to put a sticker
on a phone set to say it is SIP compliant.

That is why SKYPE has over 54 million users today.

/PETER MACAULAY

At 11:38 AM 9/18/2005, Beith, Gordon wrote:
>Content-class: urn:content-classes:message
>Content-Type: multipart/alternative;
>         boundary="----_=_NextPart_001_01C5BC66.FB937788"
>
>INFO method is used for various mid-call communication and also for 
>SIP-T (i.e. ISUP transparency).
>It has been used for, but is not recommended, DTMF communication. 
>RFC 2833 is the recommendation for that.
>Further to this, and proprietary messages, services, etc. use INFO 
>method as well. This sounds like what you want to do here.
>
>
>----------
>From: discussion-bounces at sipforum.org 
>[mailto:discussion-bounces at sipforum.org] On Behalf Of Darko Milic
>Sent: Sunday, September 18, 2005 4:06 AM
>To: discussion at sipforum.org
>Subject: [SIPForum-discussion] INFO method
>
>Hi all,
>
>I am curious about usage of INFO method. Actually, I need advice. I 
>haven't noticed any practical solution that uses this method yet. 
>Like it's not popular method for using today. Maybe I am wrong, but 
>I have feeling that MESSAGE within dialog could do the same job; 
>exchange signaling information among parties.
>My intention is to send some additional signaling information 
>important for upper application immediately after SIP dialog (with 
>INVITE) has been opened. Questions are: What should I use? What is 
>the preferable method today for such things? Is there some RFC that 
>obsolete RFC 2976 (INFO)?
>Regards,
>Darko
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