Specifies the Physical Layer Repeater Protocol (PHY-REP) for the upper sublayer of the FDDI Physical Layer. FDDI provides a high-bandwidth (100 Mbit/s), general-purpose interconnection among information processing systems, subsystems, and peripheral equipment, using fibre optics or other transmission media. FDDI can be configured to support a sustained data transfer rate of at least 80 Mbit/s (10
Mbyte/s). FDDI provides connectivity for many nodes distributed over distances of many kilometers in extent. Certain default parameter values for FDDI (e.g., timer settings) are calculated on the basis of up to 1 000 transmission links or up to 200 km total fibre path length (typically corresponding to 500 nodes and 100 km of dual fibre cable, respectively); however, the FDDI protocols can support much larger networks by increasing these parameter values.
