Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1988-07-18
1989-08-08
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455 34, 379 61, 379 62, H04Q 700
Patent
active
048560839
ABSTRACT:
A method of connecting a cordless telephone by radio without using control channels selects priority radio channels from radio channels which are shared by cordless telephones and assigns each of them to a respective one of the cordless telephones. So long as the priority radio channel assigned to any of the telephones is not occupied by another telephone, that telephone uses it. A portable unit of the telephone is allowed to enter into a call origination flow in response to a call origination request only after confirming that an incoming calling signal is not being sent over the priority radio channel from a fixed unit which is associated with the portable unit. Even when a call origination request occurs before a radio connection for an incoming call, the fixed and portable units are prevented from tuning to different radio channels without the need for a control channel.
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Griffin Robert L.
Kuntz Curtis
NEC Corporation
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