SEI Power Systems
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 |
 Industry Standard Network Termination Units.Longest Warranty in the Industry • B300 NT1 • P230 Circuit Card NT1 |
| 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) |
 Provides 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 |
 The 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 |
 Extends 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 |
 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 |
 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 |
