[SIPForum-discussion] Need Detail on SIP to RTP conversion Point

[Sharanagoud BD.]

Rajesh,
 
Here comes two scenarios
1: Dialog
2: Transaction.
 
See, to diffrentiate the transactions we need branch field and to differentate the calls/dialog we need tag field.
So SIP proxies while forking they will send with different branch parameter. so that we can identify the transactions very easily.
 
Tag matters to identify that the whether tha responses belong to same call/dialog.
For dialog we need to tag, from tag and call id.
 
For this forking no need to bother about tag field, only we can check for different branch.
 
NOTE: As per 2543 rfc from tag and branch are also optional.
 
 

Thanks,
Sharanagoud.
   

 

________________________________

From: rajesh [mailto:rajeshkumar.r at imimobile.com] 
Sent: Thursday, April 10, 2008 10:27 AM
To: Sharanagoud BD.; Halit Sakca; discussion
Subject: Re: [SIPForum-discussion] Need Detail on SIP to RTP conversion Point


Hi ,
I have a doubt regarding branch and tag field.
tag is basically with to and from field.
branch is basically with via field.
Proxy recvs a request from UAC.
Proxy forks the request and add brach parameter to differentiate different response coming from UAS.
and same response gets transferred back to UAC.
 
In this complete scenario where the tag field will come into picture.
 
Please correct me if i am wrong.
 
Thanks and Regards
Rajesh Kumar
Sr. Software Engineer
R & D - Network Group 
+91 40 23555945 - 235
+91 99084 00027
www.imimobile.com 
 
 

	----- Original Message ----- 
	From: Sharanagoud BD. <mailto:sharanagoud_bd at spanservices.com>  
	To: Halit Sakca <mailto:sakcahalit at hotmail.com>  ; rajesh <mailto:rajeshkumar.r at imimobile.com>  ; discussion <mailto:discussion at sipforum.org>  
	Sent: Thursday, April 10, 2008 10:09 AM
	Subject: RE: [SIPForum-discussion] Need Detail on SIP to RTP conversion Point

	Hi Rajesh,
	 
	If there is no ip address in from field also, error response will reach the client.
	bcz always responses depends on the "Via" field. So 400 error response will be the
	answer.
	 

	Thanks,
	Sharanagoud.
	   

	

	 

________________________________

	From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Halit Sakca
	Sent: Wednesday, April 09, 2008 8:32 PM
	To: rajesh; discussion
	Subject: Re: [SIPForum-discussion] Need Detail on SIP to RTP conversion Point
	
	
	Hey Rajesh,
	 
	"400 Missing Mandatory SIP Header" will be the response.
	
	Selamlar,
	Halit Sakca
	
	
	
	

________________________________

		From: rajeshkumar.r at imimobile.com
		To: discussion at sipforum.org
		Date: Tue, 8 Apr 2008 16:31:17 +0530
		Subject: Re: [SIPForum-discussion] Need Detail on SIP to RTP conversion Point
		
		
		Hi All,
		what will be proxy response if we are sending an request with no parameter in From 
		field. and how the  error response will arrive back to client as there is  no IP address in from field.
		 
		Thanks and Regards
		Rajesh Kumar
		Sr. Software Engineer
		R & D - Network Group 
		+91 40 23555945 - 235
		+91 99084 00027
		www.imimobile.com <http://www.imimobile.com/>  
		 
		 

			----- Original Message ----- 
			From: Rajeshkumar Babu <mailto:rajeshkumarbin at gmail.com>  
			To: discussion <mailto:discussion at sipforum.org>  
			Sent: Sunday, April 06, 2008 2:50 PM
			Subject: [SIPForum-discussion] Need Detail on SIP to RTP conversion Point

			Hi
			
			Kindly tell me the point where the RTP headers get know the B Party IP address and start the RTP transactions for a voice call.
			
			Like in SS7 ISUP msg the CIC is taken from initial IAM message.
			
			So the B Party address is taken from contact of 200 ok messages or ....pls correct me...??
			
			-- 
			Thanks & Regards
			
			Rajeshkumar B
			
			
________________________________


			
			_______________________________________________
			This is the SIP Forum discussion mailing list
			TO UNSUBSCRIBE, or edit your delivery options, please visit http://sipforum.org/mailman/listinfo/discussion
			Post to the list at discussion at sipforum.org
			


________________________________

	Ailenizi, arkadaşlarınızı en son ne zaman gördünüz? Windows Live Messenger'dan ücretsiz Görüntülü Aramalar - buradan ÜCRETSİZ yükleyin! Buraya tıkla! <http://get.live.com/messenger/overview>  

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20080410/ebaff00b/attachment-0002.html>