Appendices

Phase 3 with iterated transmission of DLE EOT and IDs due to no re- sponse or invalid response

If the sending station receives no response or any invalid response from the receiving station in response to the sent sequence of DLE EOT and IDs, it iterates sending of the sequence at 0.5-second intervals up to 60 times.

If the sending station receives a sequence of DLE ACK and IDs before sending the sequence of DLE EOT and IDs 60 times, it terminates the message transmission normally and releases the data link.

Sending station

0.5second

0.5second

DLE EOT and IDs (1)

DLE EOT and IDs (2)

DLE EOT and IDs (3)

DLE ACK and IDs

Receiving station

Normal termination

Abnormal termination of phase 3

If the sending station receives no sequence of DLE ACK and IDs from the receiving station within 0.5 second from the 60th sequence of DLE EOT and IDs, it aborts the message transmission abnormally and releases the data link.

Sending

DLE EOT and IDs (1)

Receiving

station

station

 

0.5 second

DLE EOT and IDs (2)

 

 

 

0.5 second

DLE EOT and IDs (3)

 

 

 

DLE EOT and IDs (60)

0.5 second

Abnormal termination

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