Telephonic communications – Subscriber line or transmission line interface – Network interface device
Patent
1995-07-24
1997-04-08
Zele, Krista M.
Telephonic communications
Subscriber line or transmission line interface
Network interface device
379 61, 379188, 379190, 379373, 455 383, 455127, H04M 1102
Patent
active
056195680
ABSTRACT:
A cordless telephone system comprises a base unit and a portable handset having a rechargeable battery. To conserve battery power in the handset, the ringer is normally in an inactive state but may be switched active for a predetermined period of time. Thus, if the handset is within the range of other telephones within a household, the ringer on the handset will normally not be activate and the ringer on the handset will not indicate the receipt of an incoming call. To activate the ringer for the predetermined period of time, which would be desired when the handset is out of range of the other telephones, the user presses a timer switch for activating a timer. A CPU in the handset then enables the ringer while the timer is counting down the predetermined period of time. In another embodiment, the user can enter a desired period of time during which the ringer is active.
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Kananen Ronald P.
Saint-Surin Jacques M.
Sony Corporation
Sony Electronics Inc.
Zele Krista M.
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