US PATENT SUBCLASS 455 / 520
.~.~.~.~.~ On-site or multi-site trunking

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

39  DF  TRANSMITTER AND RECEIVER AT SEPARATE STATIONS {14}
500  DF  .~ Plural transmitters or receivers (i.e., more than two stations) {4}
507  DF  .~.~ Central station (e.g., master, etc.) {6}
517  DF  .~.~.~ To or from mobile station {5}
518  DF  .~.~.~.~ Having talk group {2}
520.~.~.~.~.~ On-site or multi-site trunking

DEFINITION

Classification: 455/520

On-site or multi-site trunking:

(under subclass 518) Subject matter which includes co-existing trunking systems operating in the same geos:graphical area or a trunking system having more than one base station.

(1) Note. A trunking system is a system comprising one or more base sites, a resource controller, and a number of subscribers which share a limited number of communication resources. The resource controller grants only upon request via the base site a communication channel to any subscriber desiring the service. The base site in the trunking system supports a much larger coverage area than that of a cellular base station.