Zhone Technologies 600 - Manual (Page 45)

Server Cards 2-21
FRS Card ACS-FRS Card User Screens and Settings
FECN
The Forward Error Congestion Notification counter logs the number of frames with the FECN
bit set by the system. This flag tells you that congestion avoidance procedures should be
initiated.
BECN
The Backward Error Congestion Notification counter logs the number of frames with the
BECN bit set by the system. This flag tells you that congestion avoidance procedures should
be initiated.