QSFP/QSFP+ Passive Electrical Loopback is used for testing QSFP/QSFP+ transceiver ports in board level test. The electrical loopback provides a cost effective low loss method for QSFP/QSFP+ port testing. The Loopback is packaged in a standard MSA housing compatible with all QSFP/QSFP+ ports. http://www.sfpchina.com/
