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Telemarketing Blocker is free Caller ID screen software that retrieves caller's telephone number using your voice modem (you must have subscribed Caller ID feature from your TeleCom. and your modem supports Caller ID in your local state). It  can block your unwanted calls from telemarketers, surveys, charities, prank calls or automated dialers.  You may setup your private block list (for prank calls) or import a public block list (for telemarketing calls) from our user sharing block list. Also it works in two modes: Mode1 (Transparent) or Mode2 (Replace Ringer).

Program Features:

  • Caller ID informs you of who's calling

  • Two types of black list (private black list and public black list)

  • Auto answers calls in blacklist and play SIT tone to the caller

  • Play a wave message ("please put me on your do not call list") to blocked calls and then hangs them up automatically

  • Complete history of all calls received

  • Works in two modes (Transparent or Replace Ringer)

  • Auto load while system starts up

  • Minimize on start up

  • Hide to systray

  • Public Block List Sharing Project


tbsetup.JPG (34805 bytes)



Software Download:

Click Here Download Teleblocker.zip


Frequently Asked Questions

What is SIT tone? The SIT (Special Information Tone) tone is the short "doo-doo-doo" sound you hear when you dial a disconnected number.Telemarketers don't want to pay their operators to dial the phone and listen to busy signals and answering machines, so they have a computer do it for them. The Predictive Dialer is programmed to hang up if it hears a SIT tone, since it knows the line is disconnected. It doesn't listen to what's said after the SIT tone, since it doesn't understand words. The Telemarketer takes that number out of their database too, so it won't be called again!

Why shall we play a wave message ("please put me on your do not call list") to the telemarketer after the SIT tone? The SIT tone is for computer dialers. But if the telemarketer dials manually, we must tell them put this number to their DO-NOT-CALL list. Two federal laws, the Telephone Consumer Protection Act of 1991 and the Telemarketing and Consumer Fraud Abuse Prevention Act, give you the right to tell a telemarketer not to call you again. 


What is a voice modem? A voice modem is a modem that is capable of playing and recording audio over a telephone line.   While almost all modems are data and fax capable, more and more also have voice capabilities. Learn more in our  Voice Modem FAQ.

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