scope:

The present document specifies the mechanical and electrical characteristics (except safety, overvoltage and EMC aspects), the necessary functional characteristics and the corresponding conformance tests for a terminal equipment interface for:

- connection to the network termination points of 34 368 kbit/s digital unstructured leased lines (D34U); and

- connection to the network termination points of 34 368 kbit/s digital structured leased lines (D34S) which support an unstructured 33 920 kbit/s information transfer rate.

These leased lines are defined in EN 300 686 [7] and EN 300 687 [8].

The present document is written only to ensure that the interface of the terminal equipment is compatible with the 34 Mbit/s digital unstructured or structured leased line. The present document is applicable to all interfaces designed for connection to the leased line, however in the cases of apparatus that carries a particular service, of complex apparatus and of apparatus in private networks, other requirements may apply in addition to the present document.

Customer premises wiring and installation between the terminal equipment and the Network Termination Point (NTP) are outside the scope of the present document.