ISDN User Interface Standards - Architecture

• B Channel - 64 kb/ s

  • circuit switched, packet switched, leased line digital voice, fast data, Fax, degraded video

• D Channel - 16 or 64 kb/s

  • carries signaling information to control B channel circuit switched calls
  • can carry low bandwidth telemetry
  • low speed data, videotex, teletex, terminals

• H Channel(s) 384 or 1536 or 1920 kb/ s

  • user info at higher rates, customed groups packaged for each user

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