Editing T interface

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]] [[Integrated_Services_Digital_Network#Reference_points|reference point]] that is characterized by a four-wire, 144 [[kilobit|kbit]]/s (2B+D) user rate.

Other characteristics of a T-interface are:
* it accommodates the [[link access]] and [[transport layer]] function in the ISDN architecture
* it is located at the user premises
* it is distance sensitive to the servicing [[Network termination 1]]
* it functions in a manner similar to that of the [[Channel service unit]]s (CSUs) and the [[Data service unit]]s (DSUs).<ref name="FS1037C">{{FS1037C}}</ref>

The T interface is electrically equivalent to the [[S interface]], and the two are jointly referred to as the S/T interface.<ref name="ralphb">{{cite web |url=http://www.ralphb.net/ISDN/ifaces.html |title=ISDN Tutorial: Interfaces |last=Becker |first=Ralph |work=ralphb.net |access-date=2014-01-22 |date=2006-12-05}}</ref>

==See also==
* [[R interface]]
* [[S interface]]
* [[U interface]]

==References==
{{Reflist}}

[[Category:Networking hardware]]
[[Category:Integrated Services Digital Network]]


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