Field Guide · protocol

Also known as: Capacity Plus, Cap Plus, Capacity Max

Capacity Plus is Motorola’s proprietary DMR trunking mode (part of the MOTOTRBO family) that pools several channels and rotates the control signalling among them (see rest channel), giving conventional DMR trunked capacity without a separate dedicated control channel. (Capacity Max is the larger multi-site successor.)1

rest/control voice voice voice pooled two-slot DMR channels; control rotates
Capacity Plus pools two-slot DMR channels and moves control among them rather than dedicating one.

Overview

Following Capacity Plus means tracking the rotating control as it hops, then decoding the granted timeslot — GopherTrunk’s DMR support is vendor-aware of these Motorola grant formats.

Sources

  1. Digital mobile radio — Wikipedia, for DMR and Motorola’s proprietary Capacity Plus trunking built on the DMR air interface. ↩

See also

Learn it step by step

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