10/25GBASE-CSR SFP28 Module for MMF. The Cisco 10/25GBASE-CSR Module supports a link length of up to 300/400m over OM3/4 at 10G, and up to 300/400m over OM3/4 at 25G . It also supports link lengths of 82m over OM2 at 10G, and up to 70m over OM2 at 25G.