The present document specifies the technical requirements and test principles for bi-directional and symmetrical leased
line connections of SDH virtual containers, i.e. VC-4, VC-3, VC-2 and VC-12. Signals transmitted across the leased line
connections are subject to restrictions (e.g. to the payload independent path overhead) and impairments (e.g. transfer
delay, jitter, wander, errors, etc.).
A connection is presented via interfaces at Network Termination Points (NTPs) and includes any equipment that may
provide the NTP. Together with the companion standard, EN 301 165 [4] defining the network and terminal interface
presentation, the present document describes the technical characteristics of the leased line service offered to the user.
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 compliance tests for the connection requirements. The present document does not
include details concerning the implementation of tests, nor does it include information of any relevant regulations.