Error Performance Objectives for Real Digital Radio-Relay Links Forming Part of the High-Grade Portion of International Digital Connections at a Bit Rate Below the Primary Rate within an Integrated Services Digital Network
For the objectives of bit error performance, a hypothetical reference digital connection at a bit rate below the primary rate has been defined in ITU-T Recommendation G.82 1. It is sub-divided into portions of different circuit quality,termed “high grade”