Technical data

302 Appendix D Interfaces
Table D.4 EOF Delimiters
No. Name Meaning Remarks
1 EOFt This shows that the sequence of the SEQ_ID which is owned by a
frame.
2 EOFdt This is used to cancel the exclusive connection. This identifies the final
ACK of the sequence and shows that the sequence of the SEQ_ID
owned by a frame has completed.
Class 1 is not
supported.
3 EOFn This is used when no other EOF delimiter (EOFt or EOFdt) which shows
valid frame contents is required.
4 EOFdti When the EOFdt has illegal contents, it is replaced with the EOFdti.
5 EOFni When the EOFt or EOFn has illegal contents, it is replaced with the
EOFni.
6 EOFa This is used to terminate a partial frame owing to an error occurred
during a transfer. A receiver must abandon the frame without making
any response.
 Primitive Signals
A Primitive Signal a signal that has special meaning. The following Primitive Signals are
defined.
IDLE:
An IDLE is a Primitive Signal transmitted on the link to indicate an operational Port
facility is ready for frame transmission and reception. The IDLE is transferred when no
frame, R_RDY, or primitive sequence is being transferred on a link.
R_RDY (Receiver Ready):
The R_RDY indicates that a single Class 1 connect-request (SOFc1), Class 2, or Class 3
frame was received and that the interface buffer which received the frame is available
for further frame reception.
ARBx (Arbitrate) --- FC-AL:
An ARBx is a Primitive Signal transmitted on a Loop by a participating L_Port to request
access to the Loop. It may be sent instead of the IDLE when the AMS200 is connected to
the FC-AL.
OPNyx (Open full-duplex) --- FC-AL:
An OPNyx is a Primitive Signal transmitted on a Loop by a participating L_Port to
indicate that it is ready for Data and Link Control frame transmission and reception.
OPNyy (Open half-duplex) --- FC-AL:
An OPNyy is a Primitive Signal transmitted on a Loop by a participating N_Port to
indicate that it is ready for Data and Link Control frame transmission and Link Control
frame reception.
OPNfr (Open broadcast replicate) --- FC-AL:
An OPNyy is a Primitive Signal transmitted on a Loop by a participating L_Port which
desires to communicate with all participating L_Ports on the Loop.
OPNyr (Open selective replicate) --- FC-AL:
An OPNyr is a Primitive Signal transmitted on a Loop by a participating L_Port which
desires to communicate with a subset of L_Ports on the Loop.