Acknowledgements
An Acknowledgement is used to acknowledge
reception of a packet or as an affirmative
response to FREE BUFFER ENQUIRIES and is
sent by the following sequence:
!" An ALERT BURST
!" An ACK (ACKnowledgement--ASCII code
86H) character
ALERT BURST
ACK
Negative Acknowledgements
A Negative Acknowledgement is used as a
negative response to FREE BUFFER ENQUIRIES
and is sent by the following sequence:
!" An ALERT BURST
!" A NAK (Negative Acknowledgement--ASCII
code 15H) character
ALERT BURST
NAK
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