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Joined: Thu Jun 22, 2006 2:19 pm Posts: 2890 Location: Devon, UK
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You could use it to distribute calls in round-robin fashion to multiple instances of Asterisk (in VServer/OpenVZ containers, or real servers), thereby increasing your peak call load. You can do this fairly effectively with Asterisk alone however.
Some use Kamailio (as OpenSER is now known) for the slightly better NAT-traversal techniques it provides over Asterisk's capabilities, although I think Asterisk v1.6 has closed the gap. In these days of ISPs aggressively filtering and shaping traffic, establishing a VPN-tunnel is often the most reliable solution.
Another use for Kamailio is to relieve Asterisk of the processing load of registrations. See middletn's recent posts here for more info on that topic.
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