Campus Safety Magazine

Trigon Castlegate Wireless Telephone Entry System

The Castlegate Wireless telephone entry system by Corona, Calif.-based Trigon Electronics Inc. is a hands-free system that uses the latest VoIP technology and non-line-of-sight 900MHz broadband RF ...
Security

DoorKing4G-LTE Cellular wireless connection

Wireless Access Control! Now connect your DoorKing Access Control and Telephone Entry Systems with our new 4G-LTE Cellular wireless connection! No more trenches to dig, no more wires to run! The DKS ...
Business Wire

Linear Demonstrates New Generation of Plus Series of Telephone Entry Systems and Access Controller with New Web Programming Support at FENCETECH’08

LAS VEGAS--(BUSINESS WIRE)--At FENCETECH’08 this week, Linear LLC, an innovator in telephone entry, access control, gate operator and radio control products, will demonstrate its new generation of ...
EDN

Intercom System with Telephone-Based Door Entry

The circuit provides a simple illustration of a door phone intercom system having a two-way communication using the features of LM386 amplifier. Intercom – short for intercommunication, is an ...