SEI POWER

Founded in 1977, SEI manufactures DC (direct current output) critical power systems and customer-premises power equipment (CPE) for industrial users, wireless, telephone service providers, and the military. SEI is located in a 24,000 sq. ft modern manufacturing facility in Frederick, Maryland. SEI has shipped over 30,000 DC critical power systems to customers around the world. SEI products are proudly made in the USA... SEI also builds DC powering systems and Network Termination Units (NT1s). These provide power and computer interfaces for Digital Centrex telephones, which employ ISDN as its protocol. SEI is the largest supplier of these products in North America... SEI is the leading supplier of uninterruptible power systems and NT1s for Digital Centrex (ISDN) customer premises equipment. All SEI units come fully assembled and ready to mount!

Also known as: SEI

Primary location: Frederick United States