Subject: [SIP] Clarification of CSeq

From: "Velibor Cakarevic (ECS)" <[email-masked]>
Date: Mon, 22 May 2000 10:10:09 +0200

In the document draft-ietf-sip-call-flows-00.txt there is an example of a successful SIP to SIP session establishment (chapter 3.1.1).

I wonder if the CSeq should not increase its value by one when a session is terminated with the BYE signal? In the draft example the Invite signal has the value CSeq: 1 INVITE and the bye signal CSeq: 1 BYE. Should it not be CSeq: 2 BYE?  

Assume that a User A sends 'INVITE' to a User B (CSeq: 1 INVITE). User B replies with '486 busy here' (CSeq: 1 INVITE). What should the value of CSeq be in 'ACK' from User A to User B? I think it should be CSeq: 2 ACK.

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Velibor Cakarevic <[email-masked]>

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