Tait TM8100 Protocol Manual page 74

74 CCR
The notify parameter also sets a filter that allows the user to suppress decode
sequences from being reported if they consist of less than the selected
number of tones in a continuous sequence, as follows:
If the decode buffer contains less than the selected number of tones when
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it is reset the contents shall be discarded.
If a radio in CCR receives a speech call it is very likely that the user will see
this response with garbage decode sequences (1 or 2 tones) if the filter is
removed.
The additional tone period added to the buffer time allows the radio to
detect and report if a gap was present or not after the sequence detected.
TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual
© Tait Electronics Limited April 2007