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 ...

Forbes contributors publish independent expert analyses and insights. I am an investigative attorney and physical security specialist. Many buildings, including apartment and condo complexes, are ...

February, 2019 – Farmingdale NY. Alpha Communications® today announced that it has released its new AlphaTouch™ multi-family smartphone video-intercom system. AlphaTouch™ is designed to be the low ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. IP audio and control specialist Barix now supports Crestron Rava SIP intercom and phone ...

As television moved out of the laboratory and into regular broadcasting schedules during the decade of the 1930s, it was obvious early on that the “hand signal” methodology used in radio broadcasts ...