[SIPForum-discussion] Regarding sequence of 1XX response

[Harbinder Singh]

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Harbinder
 
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From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Niketa Pal
Sent: Friday, May 23, 2008 7:29 AM
To: Roy, Nishant Kishore
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] Regarding sequence of 1XX response
 
Hi Nishant,

Party B can send 183 Session in Progress response before 180 Ringing.
There is no such constraint in SIP to send 180 first n then 183. 

Regards,
Niketa
On Fri, May 23, 2008 at 4:03 PM, Roy, Nishant Kishore <nishantkr at hp.com>
wrote:
Hi all,

I have one call flow like ...

 A               B
 ----------INVITE-->
 <---------183-----
 <--some announcement will be played here ----->
 ------PRACK------>
<------200 ok for PRACK---
<-----180 ringing -----



Mu doubt comes over here can a party B send a 183 before 180 ..... I
mean the 1xx response has to maintain in some sequence ?




Regards
Nishant


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