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Richard Shockey
Shockey Consulting LLC
Chairman of the Board SIP Forum
www.shockey.us
www.sipforum.org
richard<at>shockey.us
Skype-Linkedin-Facebook rshockey101
PSTN +1 703-593-2683
As I understand SIP use, the multi-hop mechanisms are another example of
tightly-control operational prior arrangement, behind the scenes. So it
might qualify for "at scale" (though it might not) but it's operation
isn't sufficiently open -- ie, permitting /casual/ interoperation.
True Dave. There are a fair amount of constraints that have to be applied on a
per hop basis but it does scale. I would say dialing a phone number is pretty
casual interoperation.. ☺
SIP URI as identifiers never took off [ yes Virginia Telephone numbers are
still here) but its use in core carrier networks along with the 3GPP IMS super
set is now dominant. In the US that is now about 40% of all Voice minutes in
the interconnected Public SIP Telephone Network aka PSTN. With VoLTE it will be
nearly 90%.
I'm a fan of xmpp/jabber, but it, too, simply hasn't attained sufficient
'at scale' use.
Hence my slightly-modified claim that, other than email and DNS (and,
yes, BGP), we have been strikingly unsuccessful at deploying new
distributed application services and getting them to be successful at scale.
d/
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Dave Crocker
Brandenburg InternetWorking
bbiw.net