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SEI Telephony Products
NT1's
PoweRack SERIES
DP SERIES
1145 REPLACEMENTS
BATTERY PACKS
STAND ALONE
ISDN DISTR. BAYS
SEI is the leading supplier of uninterruptible power systems and NT1's for Digital Centrex (ISDN) customer premises equipment. All SEI units come fully assembled and ready to mount!

NT1's
NT1'sIndustry Standard Network Termination Units.
Longest Warranty in the Industry

B300 NT1 
P230 Circuit Card NT1
PoweRack Series
PoweRack Series Integrated NT1 caging, DC power, battery backup and cable distribution are pre-assembled. Installation time is virtually eliminated!  Available in a variety of models depending on the number of phones, NT1 type and battery backup time required.  Field Expandable!

PR300e (up to 48 B300 NT1's and 96 phones)
PR230e (up to 48 P230 circuit cards and 96 phones)
PR96e (48 P230 circuit cards and 96 phones)
DP Series (Bulk Power)
DP SeriesProvides DC power to NT1's and phones in a small footprint with easy installation. Three different models power from 24 to 288 phones. Up to 8 hours of holdover time.

DP140e (up to 24 NT1's and 48  phones)
DP240e (up to 48 NT1's and 96 phones)
DP700e (up to 144 NT1's and 288 phones)
1145 Direct Replacements
1145 Direct ReplacementsThe S1145B battery pack and S1145R power unit are direct, snap-on replacements for failing legacy AT&T/Lucent 1145's. No rewiring is required. The S1145B monitors battery status to guarantee the holdover time of the battery.

S1145B Battery Pack
S1145R Power Unit
Battery Packs
Battery PacksExtends battery holdover time for critical applications and replaces failed batteries.

BP-8U (8 Amp-hour battery pack)
High Capacity Backup Batteries (25-90 Amp Hours)
Stand Alone
Stand Alone DP20B's power up to 3 NT1's and 6 phones with up to 4 hours of battery holdover time for stand alone installations.  For no battery backup, use the 1215B.

DP20B (powers one NT1 and 2 multipoint phones)
DP20B-E (up to 3 NT1's and 6 multipoint phones)
1215B (no battery; powers one NT1 and two mulitpoint phones)
ISDN Distribution Bays
ISDN Distribution Bays Allows in-house DC power systems to function as the power and backup source for telephones and NT1's. Allows incremental growth.  Mounts  in a rack or on the wall.

PDP30 Bay (houses 10 distribution modules)
DM500 Distribution Module

For order information or technical support contact us at
>> 800-765-4734


    >  RELATED FILES

Online Powering Guide
A complete technical overview of ISDN premises powering.

Power Supply Adjustment Procedure


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

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