Telecommunications – Carrier wave repeater or relay system – Plural modulated carriers
Patent
1985-04-22
1987-03-10
Ng, Jin F.
Telecommunications
Carrier wave repeater or relay system
Plural modulated carriers
455 33, 455 34, 455 54, 455 56, 379 63, H04Q 700, H04Q 900
Patent
active
046495673
ABSTRACT:
"Dispatch overdialing" permits radio transceivers already communicating via a repeater with other transceivers in a trunked radio communications system to call additional radio transceivers onto the communications channel in use. A radio transceiver in a first group may "dispatch overdial" another radio transceiver in a different group by transmitting a dispatch overdial begin signal to the repeater. The repeater mutes all audio communications on the channel, and the radio transceiver then transmits a sequence of identifying signals which are identical to those used to establish communications initially. The radio transceiver then transmits a further sequence of identifying signals which identify a further radio transceiver (or group of transceivers) to be called onto the channel. If the first sequence of identifying signals matches the signals which were used to establish communications initially, the repeater initiates handshake signalling to call the further transceiver(s) onto the channel. If the first sequence of identifying signals doesn't match the previously-received signals, handshake signalling is inhibited and audio muting ceases after the receipt of the further sequence of identifying signals.
REFERENCES:
patent: 2533662 (1950-12-01), Bartelink
patent: 3173996 (1965-03-01), Rypinski, Jr.
patent: 3376509 (1968-04-01), Willcox et al.
patent: 3387212 (1968-06-01), Kaufman
patent: 3426279 (1969-02-01), Berman
patent: 3535636 (1970-10-01), Muilwijk
patent: 3539924 (1970-09-01), Daskalakis et al.
patent: 3555424 (1971-01-01), Malm
patent: 3582787 (1971-06-01), Muller et al.
patent: 3634627 (1972-01-01), Valentini
patent: 3663762 (1972-05-01), Joel, Jr.
patent: 3707679 (1972-12-01), Bruley et al.
patent: 3716790 (1973-02-01), Romoser
patent: 3764915 (1973-10-01), Cox et al.
patent: 3808537 (1974-04-01), Sarati et al.
patent: 3898390 (1975-08-01), Wells et al.
patent: 3913017 (1975-10-01), Imaseki
patent: 4009442 (1977-02-01), Von Bromssen
patent: 4013958 (1977-03-01), Spayth
patent: 4112257 (1978-09-01), Frost
patent: 4125808 (1978-11-01), Graham
patent: 4127744 (1978-11-01), Yoshikawa et al.
patent: 4129749 (1978-12-01), Goldman
patent: 4144411 (1979-03-01), Frenkiel
patent: 4144412 (1979-03-01), Ito et al.
patent: 4144496 (1979-03-01), Cunningham et al.
patent: 4187398 (1980-02-01), Stark
patent: 4228319 (1980-10-01), De Jager et al.
patent: 4233473 (1980-11-01), Frost
patent: 4242538 (1980-12-01), Ito et al.
patent: 4281413 (1981-07-01), Forrest
patent: 4308429 (1981-12-01), Kai et al.
patent: 4310722 (1982-01-01), Schaible
patent: 4347625 (1982-08-01), Williams
patent: 4352955 (1982-10-01), Kai et al.
patent: 4360927 (1982-11-01), Bowen et al.
patent: 4376310 (1983-03-01), Stackhouse et al.
patent: 4384362 (1983-05-01), Leland
patent: 4398063 (1983-08-01), Hass et al.
patent: 4409687 (1983-10-01), Berti et al.
patent: 4435840 (1984-03-01), Kojima et al.
patent: 4475010 (1984-10-01), Huensch et al.
patent: 4553263 (1985-11-01), Smith et al.
patent: 4573206 (1986-02-01), Grauel et al.
The Basics of Trunked Mobile Radio, by Carol Ann Rybicki, Louis L. Taylor Barnard Johnson, Inc. Mobile Times, Oct. 1980, pp. 24-27.
IMTS System Description, Mobile Radio Department, General Electric Co., Lynchburg, Va. 24502, pp. 1-2.
General Electric Company
Ng Jin F.
Seidenglanz Elissa
LandOfFree
Dispatch overdialing for inter-group and other added calling/cal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dispatch overdialing for inter-group and other added calling/cal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dispatch overdialing for inter-group and other added calling/cal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1026126