David Cook wrote:
Thanks for the kind words. If you re-invite to create a direct path between the two SIP endpoints then Asterisk is no longer acting as a PBX because it is no longer "in the middle". The value of a PBX is precisely when it remains in the middle by offering services like call recording, call transfer/bridge, etc. that can only be accomplished when the switch is "listening".

If you keep "listening" in a hosted model, then the hosting provider requires a lot of bandwidth. So lets put the switch at your end where you have 100MB wire speed in your premise and no need to actually talk to my remote host. Anything you need to talk to my host about can be accomplished via signalling between the switches which is much less bandwidth intensive.

If you have an IAX provider that offers IAX trunking you will get a lot more calls per mbit as a result because you are saving IP overhead on multiple calls to the same destination host.

For the more paranoid, calls between office extensions never go out into the wild (and can be intercepted by anyone with ethereal and time on their hands to reconstruct the streams).

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Best regards,
 Duane

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