>From RFC 3261
"the Call-ID header field MUST be selected by the UAC as a globally unique
identifier over space and time unless overridden by method-specific
behavior."
B2B UA should have different call-ID, since both are different dialogs.
Regards,
Thangarajan.
IMPORTANT: HUGHES SOFTWARE SYSTEMS LTD. (HSS) IS NOW FLEXTRONICS SOFTWARE
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"Gregg, John"
<[EMAIL PROTECTED]
com> To
Sent by: "Avasarala Ranjit-A20990"
sip-implementors- <[EMAIL PROTECTED]>,
[EMAIL PROTECTED] <[EMAIL PROTECTED]>,
ia.edu <[email protected]>
cc
05/10/05 10:50 PM Subject
RE: [Sip-implementors] Query in
Call-ID Field
Its entirely up to you. The RFCs specify protocols, not end user behavior,
and
as far as SIP is concerned a B2BUA is an automated end user who chooses to
place an outgoing call
whenever it gets an incoming call. As long as each individual call the
B2BUA
participates in conforms faithfully to the appropriate RFCs, there are
no rules governing how similar or disimilar the calls should be with
regard to details that are properly under the control of the end user,
like the exact choice of Call ID string. Do whatever works, whatever is
easiest, and whatever makes your (human) end users happiest.
Caveat: of course, you do want to make sure that the things that are
supposed
to be globally unique stay globally unique . . .
-John Gregg
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Avasarala
Ranjit-A20990
Sent: Tuesday, May 10, 2005 11:00 AM
To: [EMAIL PROTECTED]; [email protected]
Subject: RE: [Sip-implementors] Query in Call-ID Field
Hi
If B2BUA forwards the INVITE (F1) as (F2), then Call-Ids could be same.
But if B2BUA is generating a new INVITE on behalf of SIP phone to the trunk
gateway, then call id for F2 could be different from that of F1.
Regards
Ranjit
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Tuesday, May 10, 2005 8:45 AM
To: [email protected]
Subject: [Sip-implementors] Query in Call-ID Field
Dear Sip-implementors,
After receiving a INVITE (F1) request from a SIP phone, the B2BUA sends a
INVITE (F2)request to the trunk gateway for an external call. I would like
to know whether these 2 INVITE request (both F1 and F2) should have the
same
Call-ID or not.
Regards
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