b0-b3: See the table below.
FLT ID
CCITT
ERROR
FACTOR
00 A S (F = 1) frame is received.
01 B DM (F = 1) response is received.
02 C UA (F = 1) response is received.
03 D UA (F = 0) response is received.
04 E DM (F = 0) response is received.
05 F SABME command is received.
06 G N200 Timeout (Link is set)
07 H
N200 Timeout (Link is disconnected)
08 I
N200 Timeout (Link failure is restored
to normal)
09 J N (R) frame error is received.
0A K
FRMR frame is received (Link is re-
setup).
0B L Undefined frame is received.
0C M -
0D N Improper long frame is received.
0E O
I-frame with I-field that exceeds N201
is received.
0F - -
10 - Layer 1 down (for ILC)
40 -
FRMR frame is received. (Link is not
re-setup)