The FC_MR-4 is a 1.0625- or 2.125-Gbps Fibre Channel/Fiber Connectivity (FICON) card that
integrates non-SONET framed protocols into a SONET time-division multiplexing (TDM) platform through virtually concatenated payloads.
The ONS 15454 FC_MR-4 line card enables four client Fibre Channel ports to be transported over
SONET/SDH. The Fibre Channel frames are encapsulated using the ITU-T generic framing protocol (GFP) format and mapped into either T1X1 G.707 based virtual concatenated payloads or standard concatenated SONET/SDH payloads. Gigabit Interface Converters (GBICs) can be installed on the FC_MR-4 card to transport non-SONET framed, block-coded protocols over SONET/SDH in virtually concatenated payloads.