Method for transferring a private call from a trunking communica

Details Method for transferring a private call from a trunking communica Method for transferring a private call from a trunking communica

1990-11-05

1994-05-17

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 341, 455 541, 455 561, 379 59, H04B 726, H04Q 700

Patent

active

053136543

ABSTRACT:
In a geographic region that contains a trunking communication system and a cellular communication system, wherein the coverage area of each system substantially overlaps, a method that transfers a private call from the trunking communication system to the cellular communication is disclosed. When a communication unit initiates a private call in the trunking communication system, it transfers its affiliation from the trunking communication system to the cellular communication system. Once affiliated with the cellular communication, the private call is placed to the second communication unit. The trunking communication system detects the private call and instructs a second communication unit to transfer its affiliation to the cellular communication system. Once both communication units are affiliated with the cellular communication system, the private call is conducted. Once the private call ends, both communication units transfer their affiliation back to the trunking communication system.

REFERENCES:
patent: 4802235 (1989-01-01), Treatch
patent: 5003629 (1991-03-01), Ness-Cohn et al.
patent: 5020093 (1991-05-01), Pireh
patent: 5058199 (1991-10-01), Grube

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