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.
Hope this helps.
dbc.
Sean Healy wrote:
Just a quick note to thank David for his presentation of Asterisk on
the Linksys WRT54GS platform at last night's meeting. This was my
first TAUG meeting, and it was great to see such a large turnout on
such an interesting topic. I'm looking forward to seeing David's
handouts on the web site.
Unfortunately, I wasn't able to stick around for the social part of
the event. I hope you all eventually made it over to Toby's and I'll
assume from the lack of messages this morning that it was a late night!
Not to take anything away from the concept, but I'm still a little
confused as to how placing the WRT54GS with Asterisk at the near-end
for one or two calls can save a lot of bandwidth compared to having
the Cisco phones connect directly to a hosted PBX server. I
understand installing Asterisk locally if you're running a large
number of phone/extensions at the home office, but otherwise, how is
this an advantage over a hosted Virtual PBX?
Is it the transcoding that helps?
Or maybe I'm just missing a basic understanding of how SIP works.. if
calling another extension, can the Cisco phones not re-invite
themselves to a shorter path between each other (i.e. without going
through a central server) once the connection is signaled?
Also, thanks David for the tip to use a 1-800 number as an "outgoing
extension" for users who doesn't have reliable Internet to use a VoIP
phone. That hadn't occurred to me. It's still cheaper than
traditional long distance; and to have the CID appear to be from the
small business in Toronto while you're lounging for a week at the
cottage is priceless!
Cheers,
Sean.
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