>Probably the bug here would be that, 2nd RE-INVITE (cseq 2) been tried
>to send out before the 64*t1 time duration lapsed after first 2xx for
>re-INVITE (cseq 1). 


Do you mean the 2nd re-invite should not be send out until the 64*t1 lapsed?
What if the re-transmission of the 1st re-invite is lost?
Otherwise I cannot hold a call once a call is establish. Please comment.

Richard WU
ASTRI

B, Nataraju wrote:

>Comments inline...
>
>Thanks,
>Nataraju A B
>
>  
>
>>-----Original Message-----
>>From: [EMAIL PROTECTED]
>>    
>>
>[mailto:sip-implementors-
>  
>
>>[EMAIL PROTECTED] On Behalf Of Richard Wu
>>Sent: Tuesday, October 17, 2006 9:00 AM
>>To: sip-implementors@cs.columbia.edu
>>Subject: [Sip-implementors] Re-transmitting of ACK for RE-INVITE after
>>    
>>
>a
>  
>
>>newre-invite
>>
>>
>>Hi all,
>>   RFC 3261 Section 14.1 said... "The rules for transmitting a
>>    
>>
>re-INVITE
>  
>
>>and for generating an ACK for a 2xx response to re-INVITE are the same
>>as for the intital INVITE". Consider the following re-invite scenerio
>>
>> A                        B
>>   ---- RE-INVTE (cseq 1) --->
>>   ---- RE-INVTE (cseq 1) --->   /* re-transmission */
>>
>>   <------ 200OK (cseq 1) ------
>>   ----- ACK (invite 1) --->
>>
>>    ---- RE-INVTE (cseq 2) --->
>>   <------ 200OK (cseq 1) ------ /* response to the first
>>re-transmission re-invite */
>>  <------ 200OK (cseq 2) ------
>>    ----- ACK (invite 1) --->    /* should the ua reply the ACK for
>>    
>>
>the
>  
>
>>re-transmission  200 OK within 64*T1? */
>>   ----- ACK (invite 2) --->
>>
>>My question is "should the ua reply the ACK for the  re-transmission
>>200 OK within 64*T1"?  Thanks in advance.
>>
>>    
>>
>[ABN] 3261 is very clear about this statement... 
>
><<3261 , sec 13.2.2.4 2xx Responses
>   The UAC core considers the INVITE transaction completed 64*T1 seconds
>   after the reception of the first 2xx response.  At this point all the
>   early dialogs that have not transitioned to established dialogs are
>   terminated.  Once the INVITE transaction is considered completed by
>   the UAC core, no more new 2xx responses are expected to arrive.
>/3261>>
>
>Probably the bug here would be that, 2nd RE-INVITE (cseq 2) been tried
>to send out before the 64*t1 time duration lapsed after first 2xx for
>re-INVITE (cseq 1). 
>
>  
>
>>Richard Wu
>>ASTRI
>>
>>
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