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Unread 02-03-2007, 09:31 PM   #14
krbonne
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Join Date: May 2006
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Gegroet,


First of all, thank you for replying. I'm still learning about how SIP really works so please excuse me additional questions.



Quote:
Originally Posted by martin View Post
You can use both. The eu.voxalot.com domain is a more direct path though. As the clusters fully inter operate with each other any domain name will find the final destination.
...
I hope the above 2 answers address your question. In a nutshell any URI or SIP-Code can be used to reach any VoXaLot member. The only difference is that the more direct path will connect to the member a little quicker.
[/quote]


What exactly do you mean with "a more direct path"?

I did some tests (I like to find out things myself before annoying other people with questions :-)) where I use the SIP-client on my laptop and run "tcpdump" at the same moment to verify what really happens.

The I made a PSTN-call to the SIP dail-in number here in Belgium (packetnet.be) and made a call to *010<my-number> and *031<my-number>

In both cases, I got the same thing:
- a SIP-message from eu.voxalot.com telling me that there is an incoming call
- an outgoing UDP-flow from my client to packet.be for the voice-call.

Now, of course, I cannot see what happened earlier. I don't know what happened in the earlier stages when I made the call to *010...

But can I assume that the difference is only in the "control" part (i.e. the exchange of packets to do the call-setup); but that for the call itself it does not make any difference at all.


Is the situation any different if I would configure my client to use "strickt outbound proxy"?


Again, I'm sorry for the question. I'm still trying to really understand how SIP works "under the hood".


Cheerio! Kr. Bonne.
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