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- Sat May 18, 2002 9:59 pm
- Forum: General Discussion
- Topic: telephone block for outgoing calls
- Replies: 1
- Views: 992
I remember reading an article about building a phone line monitor that will block outgoing calls to a specific number or area code. I believe it was in NUTS AND VOLTS or ELECTRONICS ILLUSTRATED.I would like to build one of these devices. Any suggestions would be appreciated.