On Tue, Oct 24, 2006 at 02:57:38PM -0400, Jay R. Ashworth wrote:
> This seems like a piece members of this list would find interesting...
Further down, he notes:
The PSTN cannot turn on a dime and restrict ANI/CLID from many
clients using "whitelist" filters. Caller ID manipulation is
used too widely for completely legitimate purposes, and any
firm providing interconnection will almost always ask for a
removal of the ingress filter when sending calls to another
carrier. I believe that a "check-ahead database" that is
consulted before call completion at any/every border is
unworkable as a matter of cost and willpower.
with which I disagree. In the current regulatory environment, the only
thing they really have handle on is calls which transit the PSTN, and
there are *already* rules which restrict what CNID may be transmitted
across the PSTN by a LEC or IXC.
Given that framework, my personal viewpoint is that that's *exactly*
the situation, and that since most switches have that code in them
already, though sometimes they don't bother to enable it, that this
shouldn't be nearly as big a deal as he says it is. All they should
have to do is instrument their ISDN trunks to see which ones are having
customer-provided CNID sent down them, and clean up their datafill
before enabling the restriction code that's already there.
It's all about they money, though: if *every* LEC and IXC taking direct
digital drops doesn't all force it at the same time, there will be
scads of carrier changes. So perhaps legislation -- or more properly,
enforcement of the current rules -- is called for.
Cheers,
-- jra
--
Jay R. Ashworth [EMAIL PROTECTED]
Designer Baylink RFC 2100
Ashworth & Associates The Things I Think '87 e24
St Petersburg FL USA http://baylink.pitas.com +1 727 647 1274
"That's women for you; you divorce them, and 10 years later,
they stop having sex with you." -- Jennifer Crusie; _Fast_Women_
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