I have a fairly sophisticated anti-telemarketer system running, a legacy from my anti-spam days when I was an enthusiast. (I wouldn't attempt this project now. I only have to maintain it a couple of times a year.)
I'm running Asterisk -- a software PBX -- and I have a SIP device connecting my phone line to my house TCP/IP network. When a call arrives, Asterisk monitors it and forwards the Caller ID to my script. That farms out searches to the net and checks my white and black lists for a match. It also checks the published North American dial plan lists to see if the number is even legitimately registered to a telco. Many are spoofed and are 100% bogus. If it determines that the caller is a likely telemarketer, it picks up the call and plays a pre-recorded "I'm sorry, the number you have called is not in service" message to the hapless caller. I manually maintain the blacklist, but I only have to lookup a caller once every few days. The rest are automatically nuked. After a number of rings it switches into answering-machine mode, and takes the call normally. We're rarely bothered by tele-spammers. On Thu, May 19, 2016 at 5:26 PM, Igor PDML-StR <[email protected]> wrote: > > Yep, and "You've got a virus on your computer" is yet another popular one. > I've had those calling me a couple of times. > The last time I asked: on which computer? > The guy asked: "How many do you have?" > I: 12 > <hangs up> > > A more interesting variation of that is described here: > http://www.wired.co.uk/news/archive/2013-04/11/malwarebytes > > > > Mark pretty much described the situation. "Do not Call" lists help only > against honest telemarketers. > Besides, "The National Do Not Call Registry does not limit calls by > political organizations, charities, or telephone surveyors." > (according to that very registry site: > https://www.donotcall.gov/faq/faqbusiness.aspx ) > > I've found that some numbers (even those that are spoofed) are repeated. > There are some in-line phone attachments (i.e. hardware) that allow you to > maintain large block-lists. > None of them seems to be ideal, but here is what I've found (based on the > review analysis) to be a reasonable candidate: > http://www.amazon.com/telemarketer-screener-programming-accidental-protection/dp/B00E914II6 > > I've just found this one that might deserve taking a look if I'd ever decide > to buy one: > http://www.amazon.com/telemarketer-screener-programming-accidental-protection/dp/B00E914II6 > http://www.amazon.com/Tel-Sentry-V2-0-Automatic-Blocking-Election/dp/B00U1PPWDO > > I am surprised why none of the phone makers has a large enough block list. > (My Panasonic's list has only 20 or 25 numbers. Gee!) > > Igor > > > > Doug Brewer Thu, 19 May 2016 13:14:48 -0700 wrote: > > Scammer: The factory warranty on your car has run out. > > Me: Really? That's tragic. Which car? > > Scammer: Pardon? > > Me: Which car lost its factory warranty? > > Scammer: Our records don't show that. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- -bmw -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
