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 ...

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 ...

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 ...

4-Line Phone Systems: Who Needs Them & Why They Still Matter Your email has been sent Discover how four-line phone systems offer reliable, simultaneous call handling and how they integrate cloud ...

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 ...

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 ...