Fibre Channel Protocol Architecture Fibre Channel Layered Model
In the FC-1 specification, every 10-bit character is represented using a special notation:
• Dxx.y: Used for data characters that map to 8-bit characters; xx is the decimal value of the lowest 5 bits and y is the decimal value of the highest bits.
• Kxx.y: Used for special control characters; xx and y are defined as for data characters.