Telephonic communications – Audio message storage – retrieval – or synthesis
Patent
1986-06-09
1987-02-24
Lev, Robert G.
Telephonic communications
Audio message storage, retrieval, or synthesis
379 58, 455 38, H04Q 704
Patent
active
046463453
ABSTRACT:
The system requires the use of the permanent ID of the requesting unit in every channel request made on a control channel before every transmission. The channel grant will include the ID along with the channel number and these may be recorded for possible later reference. A channel assignment is retained for a brief period after each transmission, allowing a conversation to be continued on the same channel without a break. Units can access the control channel with a channel request and be assigned a channel even while the dispatcher is using the voice channel. In the case of a need for communication with a larger group, a dispatcher can form a temporary "patch" group of all involved units, with a temporary ID assigned to that group. A channel request from a member of the larger group must then include, not only the permanent ID of the requesting unit, but the temporary ID of the "patch" group.
REFERENCES:
patent: 4411017 (1983-10-01), Talbot
patent: 4538029 (1985-08-01), Gazzoli et al.
patent: 4560832 (1985-12-01), Bono et al.
patent: 4574163 (1986-03-01), Zato
Heyman Bruce D.
Sasuta Michael D.
Zdunek Kenneth J.
Gillman James W.
Lev Robert G.
Motorola Inc.
Parker Margaret Marsh
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