FAQ:Does every layout block need transponding installed?
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Transponding does not need to be used over the entire railroad. Software such as RR&Co's Train Controller need only identify an engine in a start block of a schedule. This can be done at the computer's keyboard so transponding is not necessary. It simply can automate the process. All of the detection is done by the BDL boards and the identity of the train is tracked in the software.