58 CCR TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual
© Tait Electronics Limited April 2007
■ Scanning
■ Emergency
■ SDM (No GPS)
■ User mode selcalling:
■ No call setups with the front panel controls, programmable I/O
or PTT
■ No selcall alerting for identities defined in the database
CCR is intended for headless radio units. Third parties can, upon
integration, add their own implementations for things like scanning & selcall
alerts.
Note PTT initiated functionality will only be suppressed, not indicated,
notably, PTT call setup.
2.5.6 CCR Persistence
When a radio is reset nothing is saved from the current CCR session to the
next power up. Third party devices can check that the radio is alive with the
pulse command and “reprogram” it when a power outage has been detected.
2.5.7 CCR Response Time
The receive frequency in CCR mode can be changed at least every 20ms.
2.5.8 Exiting CCR Mode
When exiting CCR mode, the radio reboots. For more information, refer
to “Exit CCR Mode” on page 70.
2.6 CCR Positive Acknowledgements
The radio validates the received strings since the last command on the serial
port versus the CCR protocol when it sees an instance of the terminating
character <CR>. It returns either a positive or negative acknowledgement.
The positive acknowledgement has the following format.
Response +ssxcc
Where:
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