US PATENT SUBCLASS 455 / 518
.~.~.~.~ Having talk group

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.~.~.~.~ Having talk group {2}
519  DF  .~.~.~.~.~> Talk group forming (e.g., dynamic regrouping, talk group assignment)
520  DF  .~.~.~.~.~> On-site or multi-site trunking

DEFINITION

Classification: 455/518

Having talk group:

(under subclass 517) Subject matter wherein a common identification is assigned to a particular group of subscriber stations such that any member of the group can transceive information to one another.