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ISDN (Integrated Services Digital Network)

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AT&T ISDN (Integrated Services Digital Network) allows a single telephone line to carry voice, video, and data simultaneously to offer you more efficient and affordable service

AT&T ISDN (Integrated Services Digital Network) allows a single telephone line to carry voice, video, and data simultaneously to offer you more efficient and affordable service. With ISDN, you have the option of combining available channels to obtain additional bandwidth when you need it.

Two types of ISDN are available:

Basic Rate ISDN (BRI)

  • Two channels for voice, video, or data (B channels) capable of speeds up to 64 Kbps each
  • A third channel that carries call set-up information and low-speed packet data
  • B channels can be combined to offer speeds up to 128 KBPS
  • Multiple phone numbers can be assigned to one line

Primary Rate ISDN

  • Uses the same technology as BRI, but combines 23 B channels with one D channel
  • Offers 1.54 MBPS of bandwidth, the equivalent of a T-1 line

Features

  • All-digital service
  • Basic Rate ISDN (BRI) for speeds up to 128 KBPS or Primary Rate ISDN (PRI) for speeds up to 1.54 MBPS
  • Integrated voice, video, and data
  • Flexible capacity on demand
  • Uses existing wiring

Benefits

  • Dynamically allocate calls using bandwidth for voice calls if desired, or for bandwidth-intensive applications like Video Conferencing when needed
  • Receive multiple calls over a single line
  • Perform voice and data functions simultaneously
  • Operate over a digital network and limit errors in transmission
  • Send data at higher speeds than with analog modems
  • Share information between multiple locations without the need for a dedicated line
  • Increase speed and flexibility of remote or home office communications
  • Save money as ISDN operates over twisted-pair wiring used for telephone lines

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