Motorola Type I Is the original type of Motorola's Trunked radio system; it is based on Fleets and Subfleets.
Each system had a certain number of Fleets assigned, and then each Fleet had a certain number of Subfleets and radio IDs.
Motorola Type I systems are not scalable because they limit the amount of IDs any fleet or subfleet can support.
Each Type I ID appears as a three or four digit number, followed by a hyphen, followed by a one or two digit number (example 200-14).
The term "Privacy Plus" refers to a Type I system.