How to Build Phone Restrictors

Restrict certain phone numbers from being dialed.

Certain phone numbers can cost money by charging for special services, such as chat lines, current sports scores or the joke of the day. These phone numbers, with a 900 or 976 beginning toll-number, can put a dent into your bank account. You can use a phone restrictor that prevents anyone in your household from dialing these numbers. The phone restrictor device will stop the dialing of numbers with more than 7 digits and with a 900 number prefix.

Things You'll Need

• Phone restrictor device

Instructions

1. Plug the phone restrictor device into an available phone jack. Program the restrictor by dialing in the preset factory code into your touch-tone phone. Listen for a dial tone.

2. Press in the four-digit number on the touch-tone phone that allows you to reset the personal code number. Wait to hear the dial tone. Dial in the new personal code of your choice.

3. Listen for the beep sound to indicate that your personal code number has been set. You can hang up the phone. Press in your personal code number through the touch-tone phone to bypass the restrictions, permit outgoing calls that are more than 7 digits or perform other restrictor options.

Tips & Warnings

• You can also use the phone restrictor device at your office to prevent employees from running up your office phone bill with unnecessary calls.

• You will have to return the restrictor to the company to retrieve your personal code if you forget the number, which may take several weeks. Write down your personal code and keep it in a safe place.

References

• Electronics Now: Build This Telephone Call Restrictor (Restricting Telephone Access)
• Mike Sandman Enterprises: Toll Restrictor Instructions