Trunking Systems and Sites

• In this episode, Phil explains how trunking system networks, sites, channels, and layers all work together and gives some examples both from his local area and more hypothetical use cases.
  • This episode ties into last week’s episode about programming groups.
  • A Motorola type 2 trunking system is capable of having 28 channels per site.
  • A Smart Zone system is a collection of Smart Net systems
  • Smart Zone networks have dynamic site assignments, meaning that if a radio or talk group is not affiliated with a site, then it does not need to be broadcast on that site.
  • Although he uses a Motorola system as an example, these explanations also apply to DMR and P25 radio systems.
  • In Phil’s county, they have simulcast sites on different frequency bands.
  • These sites on this system may or may not broadcast the same talk groups.
  • Trunking systems have multiple sites in order to efficiently use the resources available, freeing up channels for local users.

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