scope:

The present document specifies the physical and electrical characteristics (except safety, over voltage and EMC aspects), the necessary functional characteristics and the corresponding test principles for a terminal equipment interface for connection to the Network Termination Points (NTPs) of Open Network Provision (ONP) 2 048 kbit/s digital structured leased lines using 120 Ω interfaces with an information transfer rate of 1 984 kbit/s without restriction on binary content.

The present document is to ensure that the interface of the terminal equipment is compatible with the ONP 2 048 kbit/s digital structured leased line. A terminal equipment interface that conforms to the present document will also be compatible with an ONP 2 048 kbit/s unstructured 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 NTP are outside the scope of the present document.