SIP INVITE

Hi all,
I am new to sip and i have downloaded Brekeke proxy server.
I am trying to build a video conferencing application .
Can anybody explain me how do i send an INVITE to the other UAC.
Specification:
Server :- 192.168.1.9:5060
UAC 1:- Sam@192.168.1.10:8080
UAC 2:- Rohan@192.168.1.9:8080

Actually my server and UAC 1 is on my Desktop and other UAC is my Laptop. I want to send an INVITE from one UAC to the other. I have tried but its given my "transaction already exists" error .

Can anybody using the above specification send my a simpe java code using Jain-sip to my email-id solanki.rohan@gmail.com .OR if anyone can send simple code snippets .

Any help will be appreciated.

Thanx in advance .

Why do you not follow the template question??

>> Can anybody explain me how do i send an INVITE to the other UAC.

UAC will send an INVITE to UAS not UAC...

Read this at first.
http://www.ietf.org/rfc/rfc3261.txt

Hi smartfish,

If both UA (Sam and Rohan) are registered in Brekeke SIP Server, Sam can just dial "Rohan". Then, the SIP Server forwards Sam's INVITE to Rohan.

Anyway, we need more information..
What kind of SDK you are using for building a video conferencing application ..
Which version of Brekeke SIP Server you are using..

And I recommend you to study SIP further.