400G QSFP-DD Loopback Module

QSFP-DD Loopback module is an 8-channel parallel passive loopback used for storage, data center QSFP-DD port testing. Monitor power supply and operation temperature; over temperature and power supply warning. It offers 8 independent data transmission channels via its internal module, an aggregate data rate of 200Gbps transmission can be achieved by this product. The cage and connector design provide backwards compatibility to QSFP28 modules, which can be inserted into a QSFP-DD port and connected to 4 of the 8 electrical channels. Data is transmitted from the host into TX of this product and then output from RX of this product back to the host.