Critical Power
Products and Services

"Over 30 years experience"
Telecommunications power
DC Power Products
uninterruptible power systems
Midspan Injectors
uninterruptible power systems
Telecom Power Services
Midspan Products
Products

System Engineering International (SEI), founded in 1977, specializes in DC critical power products and services. We engineer, manufacture, and market a complete line of low to mid-range power uninterruptible DC power and battery systems for use in communications, industrial, and military applications, digital Centrex (ISDN) telephony applications, and VoIP midspan power injectors for Power over Ethernet.

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.

Our Power Services Division installs, maintains, and services a full range of critical (uninterruptible) power systems, both UPS's and DC plants, and batteries from all manufacturers.

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