[EMAIL PROTECTED] wrote:

> Hi all, 
> 
> Have the following question: 
> 
> Does TCP mode UA maintain connection with proxy server during registering and 
>calling? 


It can maintain a connection if it likes, but it won't receive incoming 
calls on it unless the Contact URI has an IP/port that match the source 
IP/port of the connection. In the case of NAT, the Translate header 
provides an automated way to do that:

http://www.ietf.org/internet-drafts/draft-ietf-sip-nat-01.txt


-Jonathan R.


-- 
Jonathan D. Rosenberg, Ph.D.            72 Eagle Rock Avenue
Chief Scientist                         First Floor
dynamicsoft                             East Hanover, NJ 07936
[EMAIL PROTECTED]                 FAX: (973) 952-5050
http://www.jdrosen.net                  PH:  (973) 952-5000
http://www.dynamicsoft.com

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