Field Guide · term

Also known as: radio ID, unit ID

A radio ID (unit ID) is the unique identifier of an individual radio on a system, distinct from the talkgroup it is using.1 It appears in control-channel signalling and in analog in-band schemes like MDC1200.

voice transmission radio ID 4567 TG 101 every transmission identifies the individual radio
A radio ID uniquely identifies the transmitting unit, so you see who is talking, not just which group.

How it works

Each transmission and affiliation carries the source radio ID, so a monitor can see which unit is talking, not just which group.

Relevance to SDR

GopherTrunk’s Radio IDs view merges live radio IDs with any alias catalogue, letting you track individual units across a system.

Sources

  1. Trunked radio system — Wikipedia, on subscriber/unit identifiers in trunking signalling. ↩

See also

Learn it step by step

From the blog