> -----Original Message-----
> From: Ravi Ravishankar [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, May 29, 2001 1:54 PM
> To: Jonathan Rosenberg
> Cc: 'Arunachalam Venkatraman'; [EMAIL PROTECTED]
> Subject: Re: [Sip-implementors] RE: Retransmission of reliable
> provisional response
>
>
>
> Jonathan wrote,
>
> >>Lets say A and B are communicating. A sends a message M1 to
> B, and when B
> >>receives this message, it responds with M2. Since M2 retransmits are
> >>triggered by the receipt of M1, M1 must arrive in a timely
> fashion in order
> >>to complete the transaction.
>
> >>Its for this reason that non-INVITEs cap at T2; in that
> case, M1 is the
> >>non-INVITE request, and M2 is the final response.
> >>The situation also exists
> >>for responses to INVITE. Here, though, M1 is the final
> response, and M2 is
> >>the ACK.
>
> Jonathan,
>
> I was confused by the last part of your statement (The
> situation also....M2 is
> the ACK.). Is my understanding correct that ACK following
> 200-600 Response are
> not transmitted based on the timer expiry, but are
> retransmitted only if a
> retransmission of the same response is received ?
Yes.
---
Jonathan D. Rosenberg, Ph.D. 72 Eagle Rock Ave.
Chief Scientist First Floor
dynamicsoft East Hanover, NJ 07936
[EMAIL PROTECTED] FAX: (973) 952-5050
http://www.jdrosen.net PHONE: (973) 952-5000
http://www.dynamicsoft.com
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