Learn ISDN
AuthorTelecom SecurityBlog
  • Integrated Services Digital Network
  • Layers
    • Physical Layer
    • Data Link Layer
    • Network Layer
  • Channels
    • ISDN B-Channel
    • ISDN D-Channel
    • ISDN H-Channel
  • Interfaces
    • BRI - Basic Rate Interface
      • U Interface
      • T Interface
      • S Interface
      • R Interface
    • PRI - Primary Rate Interface
      • T1
      • E1
    • B-ISDN - Broadband-ISDN
  • Services
    • Bearer Services
    • Teleservices
    • Supplementary Service
  • Devices
    • Network Termination
    • Terminal adapter
    • ISDN Router
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  1. Devices

Network Termination

ISDN (Integrated Services Digital Network) utilizes network termination devices to connect customer premises equipment (CPE) to the network.

There are two primary types:

  • NT1 (Network Termination 1): Interfaces directly with the network, converting between BRI (Basic Rate Interface) signals and digital signals suitable for the local loop.

  • NT2 (Network Termination 2): Functions at a higher layer, managing multiple data channels and often includes routing, multiplexing, and switching functionalities.

These devices ensure proper signal transmission and network connectivity for ISDN services.

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Last updated 7 months ago