The ZXMP M820 is a member of iOTN series targeting metro optical transmission network applications. It enables access of a wide variety of services, multi-layered service scheduling and smooth upgrade of system, delivers flexible and mature protection schemes and supports OTN, ROADM and WASON and L2 functions. ZXMP M820 can construct hybrid network with ZXMP M820 series high-capacity electrical cross-connect equipment and employ unified network management system to provide operators with cost-effective high-quality metro OTN networks.