Telephone Systems Efficiency Co. Inc.


The SEI PoweRack 230

The PR230 is a premises powering unit that integrates NT1 caging, 48 volt DC power, and battery backup in a single unit for powering ISDN telephones and Lucent P-230 circuit card NT1's or equivalents.

The PR230 is available in two configurations. The PR230-24 will house and power up to 12 P-230 NT1's and provide power for up to 24 phones in a multipoint mode. the PR230-48 adds additional caging to house and power a total of 24 NT1's with power for 48 multipoint phones. Note that the PR230-24 can be field upgraded to PR230-48 capacity via an SEI 230R NT1 cage.

For both PR230 models output distribution is accomplished using standard 50 pin amphenol connectors which eliminate the need to use punchdown blocks. All power lines to the terminals and NT1's are protected by solid state thermal fusing. Dual load-sharing rectifiers offer redundancy, while additional external battery packs can be added at any time for increased standby time. During extended periods of utility outage the batteries are protected from over-discharge by the built-in low voltage detector and disconnect circuit. Remote monitoring is provided by a contact closure that can be interfaced to a remote alarm unit.

The PR230-24 can be utilized to provide power to legacy NT1 cages such as the Lucent NT1M-210. Additionally, a stand-alone 230R expansion cage may be powered by third party powering units such as the Lucent 1145. All PR series units are mountable either on a wall or on 19" racks. Mounting brackets for 23" or 25" racks may be ordered as options (specify 23RM or 25RM after the model number).

Ordering Information

Model # Description Dimensions
(W" x D" x H")
PR230-24 PoweRack with 1 NT1 card cage
and 2.5 AmpHr battery (2 hour holdover)
19 x 7.5 x 7
PR230-48 PoweRack with 2 NT1 card cages
and 2.5 AmpHr battery (1 hour holdover)
19 x 7.5 x 14


230R Field Installable P-230 NT1 cage 19 x 7.5 x 7
RA Remote alarm unit 2.5 x 4 x 1
BP2 Additional 2.5 AmpHr battery pack 19 x 5 x 7
NT1P-230 Lucent P-230 circuit-card NT1 with multipoint capability  
G-P230 Lucent-compatible NT1 sub-assembled in USA with multipoint capability  

Technical Specifications

Electrical Environmental
Universal Input (90-265 VAC)
Frequency 47-440 Hz
Output Voltage 37-48 VDC
Operating 0 deg C to +50 deg C
Storage -25 deg C to +60 deg C
Humidity 95% non-condensing

Optimum battery life will be achieved if the unit is operated at a temperature of 25 deg C.
NT1 Compatibility Standards
Lucent NT1P-230 UL 1950, CSA 950, FCC A 

ISDN Products :
Headsets :
Centrex Sets :
Services :
Support :
About Us :
  New ISDN Telephone Sets | Refurbished ISDN Telephone Sets | NT1 Equipment | Power Supplies | Misc ISDN Equipment | Software
  Wireless Headsets | Corded Headsets | Bluetooth Compatible Headsets | Headset Adaptors and Accessories
  Aastra - Centrex Based Telepone Sets | Scitec - Centrex Based Telepone Sets
  ISDN Telephone Refurbishing | In-House Testing Procedures | TSE Shipping Policies
  ISDN Technology Overview | Product Downloads | Original ISDN Manuals | Frequently Asked Questions | RMA Ticket Information
  TSE Company Profile | Contact Information                                                                                                                                       >> Back to Home

*** The brand names and products within this website are trademarks of their respective companies.       2005 TSE. All rights reserved.
WWW.TSE-ISDN.COM - Version 4.0 - Release Date: June 3, 2005 - Website Design By: eBlast Media