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ITU-T E.880 Field data collection and evaluation on the performance of equipment, networks and services
ITU-T E.800 Supplement 2 Curves showing the relation between the traffic offered and the number of circuits
ITU-T E.800 Supplement 1 Table of the Erlang formula
ITU-T E.800 Supplement 5 Teletraffic implications for international switching and operational procedures resulting from a failure of a transmission facility
ITU-T G.211 Make-up of a carrier link
ITU-T E.800 Supplement 7 Guide for evaluating and implementing alternate routing networks
ITU-T G.213 Interconnection of systems in a main repeater station
ITU-T G.212 Hypothetical reference circuits for analogue systems
ITU-T G.214 Line stability of cable systems
ITU-T G.215 Hypothetical reference circuit of 5000 km for analogue systems
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