Data Communications TelephonyElectro Standards Laboratories Electro Standards Laboratories - Advanced Systems Design & Services In a world crowded with thousands of companies and consultants calling themselves communication or control specialists, Electro Standards Laboratories is truly unique. At ESL, we have the ability to work from theory to product or service design to manufacturing and installation. Our solutions are based on over 30 years of technological experience and thousands of real-world applications . ESL now offers Data Cables and Switches on GSA Schedule. Product Finder Data Com