[SIPForum-discussion] confussion about use of tcp/udp

[Sharanagoud BD.]

It means, if we use two sip UA and in that one supports (X lite) only
UDP and one more UA like sipp
that supports TCP signalling. 
 
Try to establish call, in that one Via contains UDP transport and one
Via contains TCP transport.
So establishing successful call may not possible. 
 
So u can check ACK request and u can confirm that u will be having two
Via header which contains TCP and UDP.
 
bcz of tcp/udp in packets, few sip user agents may drop the packets. 
 
And also TCP will be used for only Signalling, and no one suggests to
use TCP media.
 
I think i gave enough explanation. If anything not clear means plz reply
back.
 
 
Thanks,
--Sharan.
   

 

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of khalikh uddin
Sent: Monday, June 09, 2008 1:02 PM
To: discussion at sipforum.com
Subject: Re: [SIPForum-discussion] confussion about use of tcp/udp




--- On Mon, 6/9/08, Sharanagoud BD. <sharanagoud_bd at spanservices.com>
wrote:


	hai   
	Sharana
	thanks for u reply and i cant uderstood the second sentence i.e
underlined part.Can give more information about that
	
	
	For media transmissions SIP uses only udp right??
	tcp media is not supported.
	 
	And we can use TCP/UDP both. but it depends on users how it will
reply for TCP/UDP via header fields.
	 

	Thanks,
	Sharanagoud.
	   

	

	 

________________________________

	From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of khalikh uddin
	Sent: Monday, June 09, 2008 11:48 AM
	To: discussion at sipforum.com
	Cc: kranti kumar
	Subject: [SIPForum-discussion] confussion about use of tcp/udp
	
	
hai all
can anybody tell me 
 *when a sip enabled end device opens a TCP connection and when it uses
UDP to send *REQ/RESPONSES to proxy or other UA.
*can it use both in a  aparticular diloge i.e to send INVITE use TCP and
to send ACK use       
  UDP.
*Can we force it to use TCP/UDP.
*For media transmission SIP uses only tcp.Is this true.



	



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