TeleZapper - A Way to Avoid Telemarketers?

VeniDormi asks: "While watching TV on my TiVo, I actually stopped to see an ad for a device called 'The TeleZapper', which claims to foil tele-marketers by convincing their auto-dialers that your number has been disconnected. The FAQ is light on technical details, only mentioning that the device 'emits [a] tone briefly when the line is answered'. I'm hoping Slashdotters with more telecommunications expertise can enlighten me as to: how/if this might work and whether or not it is something I could reproduce with a sound card, say for recording at the beginning of my voicemail message. Could it be as simple as playing back the three shrill tones I hear when I dial a wrong number?" Ah, the telephone equivalent to SPAM. Too bad phones don't have the equivalent of procmail filters.

Comments

I use PacBell's Privacy Manager

[crispy]

I haven't had a single phone solicitation since I signed up for the service a few months ago. It's well worth the $3/month.

How it works

[.@.]

It emits three rising tones, identical to those that precede "invalid number" errors. Automated telemarketing tools recognize these control tones and disconnect the call, AND remove the number from their dialing pool, since they think it's now an invalid number. After the three tones, the phone rings as normal. Two drawbacks: This won't work with telemarketers that don't use automated tools, and it may confuse people who call you, since their brain may also think "it's an error message, I'm going to hang up now." After all, who listens to the phone errors? When you hear the tones, you know you're not getting through, so you disconnect.

My solution to telemarketers

[atrowe]

I haven't gotten a call from a telemarketer for years.

My solution: I don't have a home phone. Whenever I am forced to give out my telephone number, I give the number to my cell phone. In my locality (Virginia, US), it is illegal for a solicitor to call a cell phone. This is because if a solicitor were to call my cell phone, *I* would be the one paying for their call.

I'm not sure if this is a nationwide law, or just a local one, but it's certainly worth looking into. Many cellular service providers are now offering unlimited local plans for around $50 US, so the cost is close to that of a regular land line.

Re:Related question

[Rackemup]

One or two times a day I receive calls with nobody on the other end. I usually say "Hello..... Hello??? Anybody there?" for a while and then hang up.
I have been told that this is a telemarketing system seeing if my number is "good". Is there any truth to this?

Most likely... they program their computers to try a number several times. If someone answers it gets flagged as "active" and you go into the caller databse.

The same thing happened to my parents last month. Every day for a week they get ghost calls (no one on the other end), then a week later someone calls to ofer them a credit card, carpet cleaning, etc.

Re:It's hasn't been much of a problem lately...

[coyote-san]

They may be required to identify themselves (both company and individual) upon demand, pursuit to the "DNC order" since you must be able to document who you told not to call you again (d'uh), but about half the time I demand this information they "accidently" disconnect me before providing this information..

By some amazing coincidence this almost always happens with blocked caller ID information. I could probably call Qworst and ask them to trace it, but I know that it's a dead end.

I only happened once, years ago, with valid caller ID information. For a long distance carrier. I couldn't reach the same department, but I reached another department and had a chat with the supervisor about the consequences of hanging up on people exercising their legal rights to stop solicitations - something that was especially pointless in this case since they were trying to sell me business services for "distinctive ringing" on my home phone number, not a separate business line! She couldn't give me the name and numbers I requested, but did promise to forward my demand (not request, demand) that a senior manager contact me on the following Monday about their violation of federal law. They never called me back, of course, but they never called me back *at all* so I let it slide.

The other scam some have tried is to claim that it could take "up to 90 days" for the DNC order to be processed. I tell them I didn't care, if they call me again they can tell it to the judge. They try to insist that the federal law permits this, I repeat that I don't care - if they call me again they'll be explaining it to the judge.

I'm sure that the law *does* allow a "reasonable" time for the DNC order to be processed, but that should be a few weeks at most with a manual system that depends on paper forms physically mailed to a central site, then physically mailed to each site in an update list. With a computerized system, the DNC order should go live either immediately or some time during the middle of the night.