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System Engineering International (SEI) engineers, manufactures, and markets a complete line of uninterruptible DC UPS's and battery systems for use in communications, industrial, and military applications, Digital Centrex (ISDN), 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.
For information and pricing on SEI's products, call us at 301-694-9601
or email us using our Contact
Us form.
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