MICS (0x32) Modular Cartridges

Nortel Digital Trunk Interface T1 (NT7B74GA , NT7B74AAAA DTI)

  • Like New: $84.88
Availability: In Stock

Norstar Digital Trunk Interface T1 (NT7B74GA , NT7B74AAAA DTI)

The Norstar Digital Trunk Interface T1 will provide users with additional 24 digital T1 or IDSN-PRI channel connections.


  • Provides access for up to 24 digital T1 or ISDN-PRI channels
  • Equipped with built-in Channel Service Unit (CSU) functionality to support the integrity of digital signaling
  • Requires either the Services Cartridge of the Combination Fiber 6-Port Services Cartridge
  • ISDN-PRI Soft Key is required in order to configure the Digital Trunk Cartridge as a PRI Card


  • Compatible with MICS 1.0 or higher
  • Core Modular ICS can support up to two DTIs for a total of 48 T1 or ISDN-PRI (digital) lines
  • Off core support of one additional DTI in MICS 5.0 or higher for a total of 72 T1 or ISDN-PRI (digital)lines

Product Reviews from Verified Customers