Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1978-10-26
1980-10-14
Wolff, John H.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455 31, H04M 704
Patent
active
042283191
ABSTRACT:
In a radio telephone system with mobile and stationary transmitting receiving stations and, connected to the stationary stations, a common switching station through which the mobile stations can be interconnected and connected to the subscribers of a line-wire telephone network, a faster connection set-up and a likewise faster switch-over of existing connections is possible because the stationary stations repeatedly transmit through their cell channel a channel number of a free duplex speech channel which is stored in a storage device in the mobile stations receiving the call channel. In response to a connection set-up command the stored channel number is used for automatically selecting the free duplex speech channel.
REFERENCES:
patent: 3582787 (1971-06-01), Muller et al.
patent: 3898390 (1975-08-01), Wells et al.
patent: 3906166 (1975-09-01), Cooper et al.
De Jager Johan B.
Noordanus Johannes
Briody Thomas A.
Popek Joseph A.
Streeter William J.
Tamoshunas Algy
U.S. Philips Corporation
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