LTR Passport - Channels

Channels

Each PassPort Trunked radio site has 3 important channels:

  • A "Home" channel that carries voice traffic for units that are homed at this site.
  • A "Group" channel that carries voice traffic for units that are roaming to this site.
  • A "Collect" channel that is used by roaming units to register with the site.

The local home channel and Seed List are programmed into the radio by the dealer. When a radio registers on a site, whether it is a home or roam site, it is also given an "almanac" of nearby neighbor site frequencies via DFA broadcast (direct frequency assignment) allowing radios the ability to Roam in large Systems bigger than the Seed List capability or when System Frequency/Channel changes have occurred without having to physically reprogram the Radio. When the currently registered site signal drops below a programmed RSSI (receive signal strength indication) threshold, it first searches the DFA almanac frequencies for a better signal. When it exhausts the almanac, it starts on a "seed list" which are frequencies of all or most sites in the Passport Radio network.

There are currently no Radio scanners available that will track a PassPort system.

Trunked radio systems

Central controller
Motorola systems: Type I • Type II • Type IIi Hybrid • Type II SmartZone • Type II SmartZone OmniLink • iDEN
Other: APCO Project 16 • APCO Project 25 • EDACS • EDACS Provoice • MPT-1327 • OpenSky • TETRA • TETRAPOL • GoTa • dPMR Mode 3 • NXDN • DMR Tier III

Scan-based / distributed control
General Electric Mobile Radio: GE Marc V
Logic Trunked Radio: LTR Standard • LTR Passport • LTR Standard and Passport • LTR MultiNet • LTR-Net

Read more about this topic:  LTR Passport

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