A T-interface or T reference point is used for basic rate access in an

Integrated Services Digital Network Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the digitalised circuits of the public switched telephone network. Wo ...

(ISDN) environment. It is a

User–network interface In telecommunications, a user–network interface (UNI) is a demarcation point between the responsibility of the service provider and the responsibility of the subscriber. This is distinct from a network-to-network interface (NNI) that defines a si ...

reference point Reference point or similar may refer to: Mathematics and science * Reference point (physics), used to define a frame of reference *Reference point, a point within a reference range or reference interval, which is a range of values found in healthy ...

that is characterized by a four-wire, 144 kbit/s (2B+D) user rate. Other characteristics of a T-interface are: * it accommodates the link access and

transport layer In computer networking, the transport layer is a conceptual division of methods in the layered architecture of protocols in the network stack in the Internet protocol suite and the OSI model. The protocols of this layer provide end-to-end ...

function in the ISDN architecture * it is located at the user premises * it is distance sensitive to the servicing

Network termination 1 Network Termination 1 (NT1) or Network Termination type 1 refers to equipment in an Integrated Services Digital Network (ISDN) that physically and electrically terminates the network at the customer's premises. The NT1 network termination provides ...

* it functions in a manner similar to that of the Channel service units (CSUs) and the Data service units (DSUs). The T interface is electrically equivalent to the S interface, and the two are jointly referred to as the S/T interface.

References

Networking hardware Integrated Services Digital Network {{compu-hardware-stub

See also

References