The present document specifies the technical requirements and test principles for connection characteristics of Open
Network Provision (ONP) 2 048 kbit/s digital structured leased lines. The leased line operates at 2 048 kbit/s and
provides an information transmission capability, without restriction on binary content, of 1 984 kbit/s. The remaining
64 kbit/s provides an 8 kHz framing structure in accordance with ETS 300 167 and ITU-T Recommendations G.704 and
G.706.
A connection is presented via interfaces at Network Termination Points (NTPs) and includes any equipment that may
provide the NTP. Signals between terminal equipments are subject to impairments during their transfer over the
connection. The limits to these impairments are stated in the present document. Together with the companion standard,
EN 300 418 [4] defining the network interface presentation, the present document describes the technical characteristics
of the leased line service offered to the user.
The tests specified in the present document cannot be carried out by the leased line provider, while the leased line is in
service, i.e. carrying users traffic. Thus the tests are designed for bringing into and returning into service, although there
is no obligation to perform these tests each time a leased line is brought into or returned into service. However, because
the connection is structured, the error performance may be monitored by the leased line provider while the line is in
service.
The present document is applicable for leased lines, including part time leased lines, for which the establishment or
release does not require any protocol exchange or other intervention at the NTP.
The present document specifies the compliance tests for the connection requirements. The present document does not
include details concerning the implementation of the tests, nor does it include information on any relevant regulations.