I setup the calling card system for the US Embassy information service
in Dakar Senegal. Calling card stuff is trivial. I just don't want
the calling card stuff crossing the boundaries or using my trunks that
are the bread and butter of the company, the call center, sales and
support. If I could co-lo it somewhere in a one or two U server in
someone's rack at a carrier hotel and get good LAN/SIP to TDM price
and quality or have it totally hosted, then It is one less thing to
worry about. Time is money as they say. My time is certainly worth
more than a few dollars an hour.
I see.
I have a friend who runs a hosting business in Vancouver and they have
plenty of servers and good bandwith - and there's a telecom carrier
called Group Telecom in the same building - and I think they can provide
SIP trunks that terminate directly to TDM. So it'd still be your own
server but it would be off your production site. You can get in touch
with me off list if you want to explore this option.
I only do SIP. H323 and MGCP in asterisk are way to buggy for my
blood. IAX is cool for WAN trunking but I try to stick with SIP/ULAW
only.
I don't really like IAX... it's not a standard, has some compatibilities
issues within itself depending on the version of Asterisk which you use,
and doesn't separate media from signaling properly. Oh, and trunking a
large number of channels can be hazardous too.
I think you're right: if bandwith is not a problem, SIP / G711 is the
only sensible way to go. Otherwise, SIP / g729 isn't too bad either.
Cheers,
Jean-Michel.
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