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EOF (End of Frame)
The EOF delimiter is an Ordered Set that immediately follows the context of a frame.
There are following EOF delimiters, shown in Table D.4, based on the service class, etc.
Table D.4
EOF Delimiters
No.
Name
1
EOFt
2
EOFdt
3
EOFn
4
EOFdti
5
EOFni
6
EOFa
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 WMS100 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.
260
Appendix D Interfaces
Meaning
This shows that the sequence of the SEQ_ID which is owned by a
frame.
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.
This is used when no other EOF delimiter (EOFt or EOFdt) which shows
valid frame contents is required.
When the EOFdt has illegal contents, it is replaced with the EOFdti.
When the EOFt or EOFn has illegal contents, it is replaced with the
EOFni.
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.
Remarks
Class 1 is not
supported.
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