T interface

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A T-interface or T reference point is used for basic rate access in an Integrated Services Digital Network (ISDN) environment. It is a User–network interface reference point that is characterized by a four-wire, 144 kbit/s (2B+D) user rate.

Other characteristics of a T-interface are:

The T interface is electrically equivalent to the S interface, and the two are jointly referred to as the S/T interface.[2]

See also[edit]


  1. ^  This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C".
  2. ^ Becker, Ralph (2006-12-05). "ISDN Tutorial: Interfaces". ralphb.net. Retrieved 2014-01-22.