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Motorola Tetra CPS (Customer Programming Software) Plus is a software tool used for programming and configuring Motorola two-way radios, including the Motorola Tetra series. It's designed for use by radio technicians, system administrators, and other authorized personnel.
Motorola Tetra CPS Plus 7.4 is a specific version of the software. The "7.4" refers to the software version number, which indicates a specific set of features, bug fixes, and compatibility updates.