<font color='black' size='2' face='arial'><font size="2"><font face="Arial, Helvetica, sans-serif">Hi all,<br>
<br>
i have a beginners question. How are SIP calls and IAX2 calls processed by Asterisk over the network?<br>
What i mean is, is there a permanent connection required between the Asterisk Server and the clients or is the Asterisk Server only involved for lets call it the "routing"?<br>
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>From my understanding SIP s used to "find" the "way" to the remote party and the voice is transferred over RTP directly from client to client without permanently involving the Server.<br>
IAX seems to do all in one, the "routing" and the transport of the voice. <br>
<br>
Is that correct?<br>
<br>
Why i am asking this?<br>
<br>
Lets say i have one Asterisk running in London and another one in Paris. Both are connected via IAX2 trunk over a WAN connection. <br>
User A is registered on the server in London.<br>
User B is registered on the server in Paris.<br>
Now User A is visiting User B in Paris and both have call with each other.<br>
Is the voice data routed from user A to Asterisk in London and then back via IAX2 to the server in Paris and the to user B?<br>
Or is there a direct connection between them and no WAN traffic is produced?<br>
And is there a difference between using either SIP or IAX as client protocol in that case?<br>
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I hope i explained well what i meant.<br>
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Thanks in advance for answers.<br>
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