<div>Hi all,</div>
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<div>Today i try to use asterisk to make SIP call between two office A and B.</div>
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<div>At the office A, i use <a href="mailto:testA@myasteriskdomain.com">testA@myasteriskdomain.com</a>. testA is softphone </div>
<div>(for testing, i use sjphone) which is running in PC with IP: <a href="http://192.168.4.100">192.168.4.100</a>.</div>
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<div>At the office B, i use <a href="mailto:testB@myasteriskdomain.com">testB@myasteriskdomain.com</a>. testB is softphone</div>
<div>(for testing, i use sjphone) which is running in PC with IP: <a href="http://192.168.0.100">192.168.0.100</a>.</div>
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<div>Now from office A, testA can register with my server Asterisk and test B </div>
<div>can also register with my server Asterisk.Now from testA, i make a call to</div>
<div>test B.</div>
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<div>1) Test A ----------send INVITE------------>Asterisk</div>
<div>2) Test A<-----------send Trying-------------Asterisk</div>
<div>3) Asterisk---------send INVITE------------->TestB</div>
<div>4) Asterisk<-------100 Trying-----------------TestB</div>
<div>5) Asterisk<-------180 Ringing---------------TestB</div>
<div>6) TestA<---------180Ringing------------Asterisk</div>
<div> Now in test B, i accept the call, then</div>
<div>7) Asterisk<-------200 OK ---------------------TestB</div>
<div>8) TestA<--------200 OK------------------Asterisk</div>
<div>9) TestA------------------------ACK--------Asterisk------------------------------------------->TestB</div>
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<div>10) TestA--------------------------------RTP stream--------------------------------------------TestB</div>
<div> Here the problem begins, i talk and i hear anything. I see in my Asterisk.</div>
<div> I see that when Asterisk receive a packet RTP from TestA, it forward immediately</div>
<div> to IP adress of TestB, because TestB is behind a server. So IP adress of TestB</div>
<div> is invisible from the world.</div>
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<div> Then, i can't hear anything.</div>
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<div> Can you please share your experience with me in this problem?</div>
<div> Thank you so much.</div>
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<div> Julien</div>
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