Non-Isolating Error Counters

Lost Frame

The lost frame error counter is contained in all adapter configurations and is incremented when an adapter is in transmit (stripping) mode and fails to receive the end of the frame it transmitted.

Frame Copied

The frame copied error counter is contained in all adapter configurations and is incremented when an adapter in the receive/repeat mode recognizes a frame addressed to its specific address, but finds the ARI bits not equal to 00 (possible line hit or duplicate address).

Receive Congestion

The receive congestion error counter is contained in all adapter configurations and is incremented when an adapter in the repeat mode recognizes a frame addressed to its specific address, but has no buffer space available to copy the frame (adapter congestion).

Token Error

This one-byte counter is contained in Active Monitor adapter configurations and is incremented when the Active Monitor functions detects an error with the token protocol as follows:

1.

A token with priority of non-zero and the monitor count bit equal to one.

2.

A frame and the monitor count bit equal to one.

3.

No token or frame is received within a 10 millisecond window.

4.

The starting delimiter / token sequence hase a code violation (in an area where code violations must not exist).