scope:

The present document specifies the technical requirements and test principles for the network interface presentations of Open Network Provision (ONP) 64 kbit/s digital unrestricted leased lines with octet integrity. These presentations are codirectional. A connection is presented via interfaces at Network Termination Points (NTP). The present document defines the network interface presented by the leased line provider and should be used in conjunction with the companion standard, EN 300 289 [3], which specifies the connection characteristics between the NTPs of the leased line. Together, these documents describe the service offered.