Interface converters added in front of measuring instrument for measuring error rate at various interfaces has clock synchronization equipment for synchronizing the interface converter

摘要

Interface converters (5) has three different interfaces, X. 21-signal (30), So-signals (20) and G.703-signal (10) which are in each case operable at the beginning and/or output interface, a converter/transducer devices (65,15,25,35,40,42,44) for converting certain initial data as well as clock synchronization equipment (60) for synchronizing the interface converter on the clock of the interface operated as an input interface.