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专利名称：Communication network capable of
automatically informing a subscriber ofoccurrence of an idle channel
发明人：Toshimitsu Shimizu申请号：US07/036520申请日：19870409公开号：US04803679A公开日：190207
摘要：In a communication network comprising a base station and a plurality ofsubstations communicable with the base station through radio channels including acontrol channel, at least one of the substations comprises a memory unit (31) for storingan identification signal representative of an off-hook subscriber when no idle channel isfound out in the radio channels. When an idle channel is detected by an idle channeldetector (24), the identification signal is read out of the memory circuit to be sent to anidle channel notification circuit (32). The idle channel notification circuit automaticallyinforms the off-hook subscriber of occurrence of the idle channel through a subscriberinterface circuit (16) by the use of a specific ringing signal. Alternatively, the identificationsignal may be sent from the substation to the base station and returned back to thesubstation so as to avoid collision among off- hook subscribers.
申请人：NEC CORPORATION
代理机构：Sughrue, Mion, Zinn, Macpeak and Seas
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