Viking Electronics TR1 Programmable Toll Restrictor Touch - 6-Digit Bypass CodeThe Viking Electronics TR1 Programmable Toll Restrictor Touch is a versatile device designed to restrict or allow specific phone numbers and prefixes, providing control over outgoing calls. It is powered by the phone line and features non-volatile E2 memory for data retention even during power outages. Compatible with both Touch Tone and rotary phones, this toll restrictor offers a range of programmable options for enhanced call management.Product Features: Phone line powered for convenient installation Non-volatile E2 memory ensures data retention Compatible with Touch Tone or rotary phones Call timer with disconnect (0.5 to 49.5 minutes) Programmable allow or restrict table stores up to forty 12-digit phone number prefixes or area codes 6-digit bypass code for single call override Programmable to ignore phone system line access numbers Programmable ignore table stores up to twelve 12-digit phone numbers (e.g., *67, *69) Programmable maximum digit string length Concealed in a standard RJ11C jack for discreet installation Allows or restricts 1-800 numbers Operational alert tones for notifications Supports emergency and toll-free numbers Specifications: Color: White Learn More: Telephone Numbering Plan - Wikipedia