SR3900: 4U Height, Supports 32x400GE, or 128x100GE/64GE, or 64x40GE, or 256x25GE/10GE SR3900 is a new generation of high-performance, high-density aggregation switch launched by Sino-Telecom for data centers, with a switching capacity of 12.8Tbps, support 32 x 400GE ports, or 128 x 100GE/64GE ports, or 64 x 40GE ports, or 256 x 25GE/10GE ports , rich data center features and enhanced Layer 2 and 3 functional features, maximize the construction needs of data centers of operators and enterprises in each industry, and help operators and enterprises build data center network platforms for the cloud computing era.