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Motorola Type II

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Revision as of 15:04, 12 May 2011 by Nbuuck (talk | contribs) (Added information regarding how a talk group is flagged as being in an Emergency state on Motorola Type II systems and how a Uniden scanner responds to it.)

Trunked Radio Systems → Motorola Type II

Motorola Type II refers to the second generation Motorola trunked radio systems that replaced fleets and subfleets with the concept of talkgroups and individual radio IDs. There are no dependencies on fleetmaps, therefore there are no limitations to how many radio ids that can participate on a talkgroup. This allows for greater flexibility for the agency. When you scan Motorola IDs, each Type II user ID you see appears as an even 4 or 5 digit number without a dash (example 2160).

Variations of the Type II Trunking system include:


Emergency Flagging

Motorola systems have two potential forms of flagging a talk group as being in an emergency mode (this gives an operator priority on a talk group until the emergency state is cleared by the dispatcher): the first method is to set a status bit in the management traffic, the second is to shift the talk group ID by +2 and patching it to the original talk group ID (+0). Uniden scanners are only capable of detecting the first method. A hack of a solution is to add the original talk group ID and the offset talk group ID (+2) to the system in the scanner and set the priority of the +2 talk group ID to be On; one can then add an alert tone and alert backlight to the offset talk group to simulate the emergency detection functionality available to systems that use the first flagging method.