Thank you for your attention..
As I mentioned before, I had a look at the SIP-ISUP draft:
http://www.ietf.org/internet-drafts/draft-ietf-sip-isup-00.txt
In above draft, I could find only one-directional solution.. i.e. SIP -> PSTN calling
case
When a SIP phone is a caller and a PSTN telephone is a callee, REL cause value could
be mapped into SIP response code..
Like this..
ISUP Cause value SIP response
---------------- ------------
1 unallocated number 410 Gone
2 no route to network 404 Not found
3 no route to destination 404 Not found
4 send special information tone ---
16 normal call clearing ---
17 user busy 486 Busy here
18 no user responding 480 Temporarily unavailable
19 no answer from the user 480 Temporarily unavailable
21 call rejected 603 Decline
22 number changed 301 Moved Permanently
27 destination out of order 404 Not found
28 address incomplete 484 Address incomplete
29 facility rejected 501 Not implemented
31 normal unspecified 480 Temporarily unavailable
But when a SIP phone is a callee and PSTN telephone is a caller, how can I convey a
"ISUP REL cause value" with a SIP CANCEL message??
According to draft, the REL message may be included in the CANCEL message body..
But I need only the cause value, not the whole REL message..
So I want to find a way to convey a cause value using a proper SIP header filed in
CANCEL message..
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 9:39 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: [Sip-implementors] Question about CANCEL usage..
Hi,
You probably want to have a look at the SIP-ISUP draft:
http://www.ietf.org/internet-drafts/draft-ietf-sip-isup-00.txt
Regards,
Christer Holmberg
Ericsson Finland
Jae-Min Ahn wrote:
>
> 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]
> > +------------------------------------------+
> >
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