Our Product Division builds DC uninterruptible power products (UPS) that provide 48 Vdc and 24 Vdc battery backed-up power with output current ranging from 2.5 to 13.5 Amps. These units feature customer-selected output distribution modules and options to facilitate use in a wide variety of applications. Battery backup options provide holdover time from 20 minutes to 8 hours. Find out more about SEI's DC UPS's...

SEI also builds uninterruptible DC powering systems for ISDN telephone networks as well as Network Termination Units (NT1's). These products are focused on providing the power for Digital Centrex telephones, which employ ISDN as its protocol. SEI is the world leader in supplying these ISDN powering solutions. Find out more about SEI's diverse line of ISDN power products...

Our Power over the Ethernet (PoE) midspan products provide power for voice and data traffic on the packet-based data Ethernet. Telephones and other end user devices connected to a local area network require power to be delivered on that LAN. As a participant of the IEEE task force that formulated the 802.3af standard for Power over Ethernet, SEI has engineered power and battery backup solutions for this technology. Find out more about SEI's Ethernet power solutions...

A Power Services division installs, services, and maintains critical power systems for the telecommunication and IT industry. Our customer base includes long distance, local exchange, and cable and interconnect carriers, as well as Government and Fortune 500 enterprise users. Find out more about SEI's Power Services...