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ISDN Video Telephony

ISDN supports video telephony. Deutsche Bundespost was runnig an ISDN video telephony pilot project in 1991.

Relevant standards

  • ITU-T F.721 (high level service description)
  • ITU-T H.221 (multiplex layer, divides B channel into 8 sub-channels of 8kbps)
  • ITU-T H.242
  • ITU-T H.320
  • ITU-T H.261 (video codec)

ISDN video calls can operate either over one or over 2 B channels.

Further pages

Marketing picture of an early ALCATEL prototype ISDN phone

Updated by laforge 3 months ago · 1 revisions

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