MULTIPLEXING/DEMULTIPLEXING APPARATUS BETWEEN TRIBUTARY UNIT GROUP-2 AND SYNCHRONOUS TRANSPORT MODULE-1 IN FIBER LOOP CARRIER SYSTEM

摘要

Purpose: a multiplex/demultiplex function is arranged to carry out between wrench -2 and a STM-1 in the multiplex/demultiplex device between -2 (tributary unit groups -2) of wrench and a STM-1 (synchronous transfer mode -1) in fiber optic loop carrier system. Construction: an AU-3 (administrative unit -3) information unit (310), which receives, to be wrenched -2 and exports it into an AU-3. One STM-1 information units (320) are by forming a STM-1 to AU-3 one section overheads of multiplication. One scrambler (330) executes contention STM-1. One light network unit (340) conversion scrambling processing STM-1 enters an optical signal. One STM-1 receiving portions (350), from the electrical data search exported from light network unit (340), export an AUG (administrative unit's group) after executing descrambling for STM-1. One AU-3 air-extractors (360) extract and export a VC-3 (virtual container -3). One wrenches -2 air-extractors (370) extracts wrench -2 from VC-3, exports from AU-3 air-extractors (360).