72 CCR TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual
© Tait Electronics Limited April 2007
2.9 Unsolicited Messages from the Radio
2.9.1 Summary and Examples
The following messages may be returned to the DTE without user
intervention.
Examples: V0612345-18 Sequence 12345 detected
V065E5E5-EE Sequence 55555 detected (E is repeat tone in this case)
M01P02 Transmit timeout warning (10s before inhibit)
M01R00 CCR mode entered
2.9.2 PTT exceeds max transmit limit
Description The radio uses this response to advise the control head that PTT is about to
timeout.
For control heads with user interfaces, the warning threshold is the duration
timer configured for the network minus 10s.
Response Msspcc
Where:
Effect Whenever the radio reaches its maximum transmit period the radio will
inform the control head. After a further short delay the radio will turn off
the transmitter.
Message Cmd Function
Vssx...xcc V Selcall decode sequence
Msspcc MP Ptt exceeds max transmit limit
Mssrcc MR CCR initialised
Parameter Value
M ASCII letter M denotes the message
ss ASCII hex number ss is the number of parameters (always “01”)
P ASCII letter P denotes a PTT being applied that has exceeded the
default transmit timer warning threshold
cc ASCII hex number cc is the checksum
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