Electronic Micro Systems, also known as EMS, is owned and operated by Halma, a publicly traded corporation. Electronic Micro Systems has been manufacturing products for the communication industry since 1987. It sells a wide variety of products that include call director systems, elevator telephones, intercom systems and master station phones. Electronic Micro Systems also offers line sharing and power distribution switches, towers and enclosures. The other products offered by the company include automated call management systems, strobe and marker lights and pole-mounting kits. Additionally, the company sells lead acid batteries, external plugs, probe clips and accessory kits. Electronic Micro Systems provides technical support services and is located in Hauppauge, N.Y.