Thank you for your attention..
I agree with you that REL can be mapped into a CANCEL..
But I want to find a way to convey REL "cause parameter" with CANCEL message..
In RFC 2543 and some related drafts, I could not find a SIP header which can properly
convey a "cause" value in CANCEL request..
Does anybody have an idea on this??
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of
Christer Holmberg
Sent: Tuesday, March 27, 2001 8:22 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: [Sip-implementors] Question about CANCEL usage..
Hi,
>Hi,
>
>I have a question about "CANCEL" usage..
>When a caller wants to cancel the call, he sends "CANCEL" request to a
>callee..
CANCEL is used when one wants to cancel a TRANSACTION, so in your case
you would use it to cancel the INVITE if you haven't received a final
response for it.
>Is it possible to convey a "cause" parameter with CANCEL request??
>In some application like a PSTN Gateway , it is helpful to convey the
>reason for canceling..
>According to "draft-ietf-sip-isup-00.txt", REL message may be included
>in the CANCEL message body..
>I hope to find a way to convey a cause using a proper SIP header
>field..
>Can anybody help me??
REL is mapped into a CANCEL if you haven't received the final response
for your INVITE, otherwise you map it into a BYE. Note that you can also
map it into BYE even if you have NOT received the final response yet.
Regards,
Christer Holmberg
Ericsson Finland
>
> Thank you..
>
>
> +------------------------------------------+
> Jae-Min Ahn
> Senior Engineer
>
> Contela, Inc.
> 9-1 Sunae-dong, Pundang-gu,
> Sungnam City, Kyunggi-do 463-784, Korea
> Mobile: +82-11-9076-6104
> Tel: +82-342-601-5830~3 (ext:109)
> Fax: +82-342-602-5830
> Email: [EMAIL PROTECTED]
> +------------------------------------------+
>
_______________________________________________
Sip-implementors mailing list
[EMAIL PROTECTED]
http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
