> -----Original Message-----
> From: Arunachalam Venkatraman [mailto:[EMAIL PROTECTED]]
> Sent: Friday, March 23, 2001 2:02 PM
> To: Sharath Rajasekar; Jonathan Rosenberg
> Cc: [EMAIL PROTECTED]
> Subject: RE: [Sip-implementors] Question about CSeq Numbers
>
>
> Sharath
> The Cseq for UAC and UAS are separate counters.
To use correct terminology, the CSeq for caller and called party are
separate. UAC/UAS are roles which change for transaction to transaction.
Caller/called-party remains for the lifetime of the call leg.
> For each, the
> value must
> increase monotonically from request to request.
Yes.
> In the example you have shown, you MAY send 2 BYE or 3 BYE,
> but you SHOULD
> send 2 BYE.
No. It SHOULD be 102 BYE.
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]] On Behalf Of Sharath
> Rajasekar
> Sent: Friday, March 23, 2001 12:38 PM
> To: Jonathan Rosenberg
> Cc: [EMAIL PROTECTED]
> Subject: [Sip-implementors] Question about CSeq Numbers
>
> Hi,
>
> A question about CSeq numbers in SIP transactions is
> - is it necessary for the CSeq for increase monotonically
> from INVITE to BYE or can a BYE have a CSeq that is lesser
> than that of the last (re)INVITE.
>
> eg.
>
> A B
> | |
> | |
> |<---------INVITE-------|
> |---------100---------->|CSeq=101INVITE
> |---------200OK-------->|
> |<---------ACK----------|
> | |
> | |
> |---------INVITE------->|
> |<--------200OK---------|CSEQ=102INVITE
> |---------ACK---------->|
> | |
> | |
> |---------INVITE------->|
> |<--------200OK---------|CSEQ=103INVITE
> |---------ACK---------->|
> | |
> | |
> |<--------BYE-----------|CSEQ=102BYE
> | |
> | |
>
>
> Is this legal or should the CSeq be 103BYE ?
>
---
Jonathan D. Rosenberg 72 Eagle Rock Ave.
Chief Scientist First Floor
dynamicsoft East Hanover, NJ 07936
[EMAIL PROTECTED] FAX: (973) 952-5050
http://www.cs.columbia.edu/~jdrosen PHONE: (973) 952-5000
http://www.dynamicsoft.com
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