[Tfug] OT - Telemarketing calls with fraudulent caller ID

[Adrian]

On Friday 25 August 2006 18:19, George Cohn wrote:
[snip]
> Or since this in a Linux/BSD list, just build an Asterisk box.  It has a 
> cool feature called "Zapateller" which can be used to play the Special 
> Information Tones (SIT) that tell you a number is disconnected.  Just 
> set it to play if the caller ID is unknown and then wait a few seconds, 
> then ring your phone.
>

Hmm, interesting... I was earlier thinking that what the phone network really 
needs, at the LATA level, is an implementation of a phone-equivalent BOGON 
filter. ISPs (usually) filter invalid/unassigned IP blocks at their borders, 
why doesn't the phone company? I suppose you could do exactly that with 
Asterisk, download the assigned/unassigned files from NANPA, write a filter, 
and drop any illegitimate calls on receiving.

Adrian