1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU%.%2!,G0G0!30%#43G0G0/ further amended)The CCITT,consideringthat pulse code modulation (PCM) multiplex equipments are already used in various countries, in particular toprovide a large number of short-distance
2、telephone circuits on certain pairs in existing cables, and in order to minimizethe number of different PCM multiplex equipments providing circuits which may be used in international connections,recommendsthat Administrations concerned should make their choice between the two primary PCM multiplex equipmentsdescribed in Recommendations G.732 and G.733.
