[Asterisk-Users] free dids on goiax.com

[trixter aka Bret McDanel]

On Tue, 2005-10-18 at 21:00 -0500, Andy Hamilton wrote:
> Or, perhaps more useful, what about something similar to a spam
> filter. Granted, there are many types of and theories for identifying
> spam and other unwanted messages, but what about adapting something
> that could be applied to this telephony service?
> 
> It could learn what sort of "threat" an account poses by examining
> number of outbound calls in a time frame, duration of said calls,
> consistency in calling specific numbers, etc.
> Something that would identify suspicious behaviours/actions...

Ultimately this boils down to two types of things which matthew hinted
at early on.  Frequency of calls and duration of calls.  The more calls
per hour (or whatever) the higher the probability someone is doing
something undesirable.  The shorter duration those calls are the higher
the probability.

Wrong numbers are typically fairly infrequent, when someone dials one
they dial the correct number and go on from there, so a couple short
duration calls isnt a cause for concern.  However a bunch of short
duration calls either continous or as an average indicates something
that is not desired.  

Ultimately it boils down to some fairly simple math to start rejecting
calls.

-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
UK +44 870 340 4605   Germany +49 801 777 555 3402
US +1 360 207 0479 or +1 516 687 5200
FreeWorldDialup: 635378
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