... -blocking cross-connect, supports tributaries Add/Drop of 1-63E1, with capability of unidirectional and bi-directional multiplexingCan realize independent service ... can build (connected with RSM-155C) various complex networks of STM-1 multi-ring, and multi-branch, etc. Provides timing synchronous ... timing sources like 2Mb/s, 2MHz, STM-1, etc., and output of 2Mb/s, 2MH reference clock, supporting SSK ...