System Engineering International (SEI), founded in 1977, is a DC power and telecommunication products company. We engineer, manufacture, and market a complete line of low to mid-range uninterruptible DC power systems for use in digital Centrex (ISDN), VoIP midspan power injectors for Power over Ethernet, and DC-UPS's for DC critical power applications. As part of its ISDN offerings, SEI also manufactures ISDN network termination units (NT1's) and ISDN terminals. Our products can be purchased directly, or through authorized resellers and distributors such as Anixter and Graybar. A division of our company, SEI Power Services installs, maintains, and services a full range of critical (uninterruptible) power systems, both UPS's and DC plants, and batteries from all manufacturers. For further information: DC-UPS Juicebox Midspan Power over Ethernet ISDN Power Products NT1's Power Services

>> PRODUCT HIGHLIGHT  >> SEI NEWS Introducing SNMP for ISDN Power Systems with the Power Management Package. Click here for the announcement. SEI announces a series of DC UPS's! SEI introduces three models of 48 Vdc uninterruptible power systems with output current up to 13.5 Amps and one model of 24 Vdc UPS with output current of 9 Amps. These units feature customer-selected output distribution modules to facilitate use with a wide variety of applications. A wide range of battery pack options provide backup time from 20 minutes to 8 hours. Click Here for more information.  > SUPPORT/SALES  > SITEMAP

System Engineering International, Inc. • 5115 Pegasus Court • Suite Q • Frederick, MD 21704 Voice: (301) 694-9601 • Fax: (301) 694-9608 • Email: info@seipower.com