TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual CCR 55
© Tait Electronics Limited April 2007
The serial port is capable of driving only a limited cable length.
For more information on the serial port, refer to the service man-
ual.
Radio operation while in CCR mode also requires, as a minimum, the
following to be defined:
■ Enable at least one channel
■ Enable at least one PTT & microphone for voice
For selcall commands it is also necessary to enable at least one network using
selcall signalling, as follows:
■ Enable network to be selcall
The radio will, upon entry to CCR, inherit programmable parameters from
the channel that was active when CCR was entered. Modifications while in
CCR mode to channel/network characteristics will be compared to this
baseline. All CCR changes are temporary, nothing is saved to the database,
therefore they are lost on power cycling.
2.3 Command Protocol
The DTE is connected to the RU via a serial link. Command and response
messages are generated between the DTE and the RU.
2.4 Command Description
This section details the standard messages.
2.4.1 Message Format
All CCR mode message packets take the following general form:
[IDENT][SIZE][PARAMETERS][CHECKSUM]<CR>
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