... -> SDH / MSTP ZS-OS622MI SDH/MSTP STM-4 Access DeviceOverviewZS-0S622MI is a STM-4 optical transmission system, ... with 1U single-board structure, compactness, high reliability, low power consumption;Provides 2×STM-4 optical line ports, ... of resources, configuration, alarm, performance, and security, etc.; Network management platform EasySDHTM can realize software remote downloading, with software ...