Acer HDS AMS200 Reference Manual page 321

Frame Delimiters
The Frame Delimiter is an Ordered Sets that immediately precedes or follows a frame
context, and consists of the SOF (Start of Frame) and the EOF (End of Frame).
SOF (Start of Frame)
The SOF delimiter is an Ordered Set that immediately precedes the context of a frame.
There are following SOF delimiters, shown in the Table D.3, based on the service class,
etc.
Table D.3 SOF Delimiters
No. Name Meaning
1 SOFc1 A frame delimiter to be used to require the exclusive connection of the
Class 1 service.
Since the subsystem does not support the Class 1 service yet, it
responds with R_RJT (Class not Supported) as to the frame.
2 SOFi1 A frame delimiter to be used when starting the sequence following the
exclusive connection of the Class 1 service.
Since the subsystem does not support the Class 1 service yet, it
responds with R_RJT (Class not Supported) as to the frame.
3 SOFi2 This is used for the first frame that starts the sequence of the Class 2
service.
Since the subsystem does not support the Class 2 service yet, it
responds with R_RJT (Class not Supported) as to the frame.
4 SOFi3 This is used for the first frame that starts the sequence of the Class 3
service.
5 SOFn1 This is used for frames other than the first frame of the sequence of the
Class 1 service.
Since the subsystem does not support the Class 1 service yet, it
responds with R_RJT (Class not Supported) as to the frame.
6 SOFn2 This is used for frames other than the first frame of the sequence of the
Class 2 service.
Since the subsystem does not support the Class 2 service yet, it
responds with R_RJT (Class not Supported) as to the frame.
7 SOFn3 This is used for frames other than the first frame of the sequence of the
Class 3 service.
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 the Table D.4, based on the service class,
etc.
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