Thursday, July 22, 2010

NT1 & Rack Arrangements

Tone Commander manufactures a complete line of NT1 ISDN Network Terminations for connecting digital voice and data equipment to the ISDN network. All of our NT1 models are compatible with any Central Office that supports the ANSI standard 2B1Q U-interface, and are also compatible with both National and Custom ISDN standards.


NT1B-300TC (NT1)


The NT1B-300TC is a compact ISDN Network Termination suitable for standalone or rack configurations. Terminal equipment (typically ISDN telephones) can be powered through the NT1. Power is provided by an in-line desktop power supply or by the rack.


Both point-to-point and multipoint ISDN terminal equipment configurations are supported. This unit may be used as a drop-in replacement in Lucent NT1B-300 applications, and is compatible with the Tone Commander NT1B-300 Rack, Lucent NT1B-310 Rack, and SEI PoweRack PR300e.

Unique features of the Tone Commander NT1B-300TC: 

  • Front edge S/T modular jacks for patch panel access
  • Termination resistor can be set/verified without removing NT1 from rack
  • Slim front profile facilitates insertion and removal in high-density rack
  • Power jack for low-cost standalone power supply  
 Standalone NT1s can be locally powered by the -PWR1 (recommended), -PWR2, or -PWR3 Power Supply options, or remotely powered by the PS-50 ISDN Power Supply. Power supplies are available separately.

  •  Two status indicator lights
  • Switch selectable S/T termination
  • Optional standalone power supply provides 16 watts power to terminal equipment; ANSI Standard PS1 and PS2 configurations
  • Desktop or rack mountable
  • Two S/T modular jacks
  • Supports ANSI MLT (Mechanized Loop Testing) requirements
  • Approved for STE phone applications outside SCIF area
  • Made in USA
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NT1B-300 Rack


The NT1B-300 Rack houses 24 Tone Commander NT1B-300TC ISDN Network Terminations in a 19" rack, 23" rack, or wall mount configuration. This rack is also compatible with Lucent NT1B-300 NT1s. It can be used as a functional replacement (without battery backup) for the SEI PoweRack PR300e-48, yet requires less than 1/3 of the vertical rack or wall space (5.2" vs. 17" high).

The rack supplies power to the NT1 units and terminal equipment connected to the NT1s from an integral power supply.

The optional NT1-200 Battery Backup can be added to provide uninterrupted NT1 and ISDN terminal power during a power failure; operating time may doubled with additional NT1-200 Add-on Batteries.
  • Rack holds 24 NT1B-300TC cards (not included with rack)
  • NT1s are hot-swappable
  • Modular S/T jacks on the front edge create a compact, easily accessible patch panel
  • S/T connections also available on 50 pin miniature ribbon connector
  • 2 S/T terminal jacks per NT1
  • U interface - 50 pin miniature ribbon connector
  • Termination switches can be viewed or set without removing NT1s from the rack
  • Self-resetting power supply provides up to 20 watts per NT1
  • Optional -LB1 Locking Brackets secure NT1 units in the rack to prevent accidental disconnection
  • 19" or 23" rack or wall mounting
  • Only 5.2" (3U) vertical rack space required, including power supply
  • Approved for STE phone applications outside SCIF area
  • Made in USA 
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NT1-296 Rack / NT1U-223TC NT1 Card

The NT1-296 high density rack with NT1U-223TC cards supports up to 96 ISDN terminals. Terminal power is provided by the integral power supply.


The optional NT1-200/296 Battery Backup allows a fully loaded rack with Tone Commander telephones to operate 2.5 - 3 hours during a power failure; operating time may increased to over 8 hours with additional NT1-200 Add-on Batteries.

  • Rack holds 16 NT1U-223TC cards (not included with rack)
  • 3 NT1 circuits per card
  • Cards are hot-swappable
  • S/T interface - 8 pin modular jacks on front panel and 50 pin miniature ribbon connector on back panel (use either)
  • 2 S/T terminal jacks per NT1 circuit  
  • Power indicator for each card
  • Status indicator for each NT1 circuit
  • Self-resetting power supply provides 5 watts average per NT1
  • Power supply can be mounted behind or above the rack
  • U interface - 50 pin miniature ribbon connector
  • 19" or 23" rack or wall mounting
  • Only 5.2" (3U) vertical rack space required
  • Approved for STE phone applications outside SCIF area
  • Made in USA 
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NT1-200, NT1-210/296 Battery Backup

Battery Backup allows the NT1B-300 Rack, NT1-296 Rack, NT1-220 Rack, or PS-50 Power Supply and terminals to operate during a power failure. Battery capacity may be doubled with an additional NT1-200 Add-on Battery.


Use the NT1-200 Battery Backup with the NT1B-300 Rack, NT1-220 Rack or PS-50, and the NT1-200/296 Battery Backup with the NT1-296 Rack. The Add-on Battery works with both models.


* Sealed lead-acid, maintenance-free batteries       * Charging current provided by rack power supply
* 7 AH battery capacity                                         * Overcurrent protection
* Power failure alarm contacts                               * Only 3.5" (2U) vertical rack space required



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