The Cisco ONS 15454 12-Port SFP-Based Multirate Optics Card (MRC-12) supports up to 12 Small Form-Factor Pluggable (SFP) modules, helping enable multirate SONET/SDH and multiple-reach capabilities. The MRC-12 card operates in either Cisco ONS 15454 SONET or SDH systems, supporting optical line rates including OC-3/STM-1, OC-12/STM-4, and OC-48/STM-16 and optical reaches from short-reach/inter-office to long-reach/long-haul including DWDM and CWDM.