H channel

H Channel is a designation for groups of channels on Basic Rate Interface ISDN (BRI-ISDN) services.

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What is H channel standards are defined by the International Telecommunication Union (ITU) and are composed of different combinations of Integrated Services Digital Network (ISDN) B channels.

The most common configurations are as follows:

  • H0 channel, which consists of six B channels multiplexed to provide a data transmission speed of 384 Kbps. This service is sometimes called switched 384 or ISDN H0.
  • H11 channel, which consists of 24 B channels to provide 1536 Kbps of bandwidth. This is sometimes called ISDN H11 or switched 1536.
  • H12 channel, which consists of 30 B channels to provide 1920 Kbps of bandwidth. This is sometimes called ISDN H12 or switched 1920.