Denso BHT-8000 User Manual page 171

Phase 3 with iterated EOT transmission due to no response or invalid response
If the sending station receives no response or any invalid response from the receiving station in
response to an EOT sent, then it iterates sending of an EOT at three second intervals up to ten times.
If the sending station receives an ACK before sending an EOT ten times, it terminates the message
transmission normally and releases the data link.
Abnormal termination of phase 3
If the sending station receives no ACK from the receiving station within three seconds from the 10th EOT,
it terminates the message transmission abnormally and releases the data link.
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Appendices