The present document specifies the technical requirements and test principles for the network interface presentations of
ONP 2 048 kbit/s digital leased lines using 120 interfaces. This includes:
- the 2 048 kbit/s digital unstructured leased line; and
- the 2 048 kbit/s digital structured leased line with an information transfer rate of 1 984 kbit/s without restriction
on binary content.
A connection is presented via interfaces at Network Termination Points (NTP). The present document defines the
network interface as presented by the leased line provider and should be used in conjunction with the appropriate
companion standard, EN 300 247 [3] or EN 300 419 [5] , specifying the connection characteristics between the NTPs of
the leased line. The present document and the appropriate connection characteristics standard together describe the
technical characteristics of the leased line.
The present document is applicable to leased lines, including part time leased lines, for which the establishment or
release do not require any protocol exchange or other intervention at the NTP.
The present document covers the physical, mechanical and electrical characteristics (except safety, overvoltage and
EMC aspects) of the network interface and specifies the conformance tests for equipment of the kind that provides the
interface presentation. Some of the tests described in the present document are not designed to be applied to the
interface of an installed leased line; such tests may be applied to equipment of the kind used to provide the interface.
The present document does not include details concerning the implementation of the tests nor does it include
information on any regulations concerning testing. There is no requirement for each leased line to be tested in
accordance with the present document before it is brought into, or returned into, service.