The perfect cost-effective and energy-efficient solution for expanding your CRS504, CRS518, CRS510 or other devices with 100G (QSFP28) or 40G (QSFP+) ports. The adapter from MikroTik allows the use of modules with lower speeds in faster ports. • QSFP28(100G) - SFP28(25G) • QSFP28(100G) - SFP+(10G) • QSFP28(100G) - SFP(1G) • QSFP+(40G) - SFP28(25G) • QSFP+(40G) - SFP+(10G) • QSFP+(40G) - SFP(1G)