Method of indicating outer communication range in digital cordle

Details Method of indicating outer communication range in digital cordle Method of indicating outer communication range in digital cordle

1996-07-24

1999-02-02

To, Doris H.

Telecommunications

Radiotelephone system

Out-of-range indication

455462, 455465, 455502, 455517, 455 677, 370280, 370347, H04M 1100

Patent

active

058677828

ABSTRACT:
A digital cordless telephone system comprising a base station and a cordless handset unit capable of time division duplex communicating with each other over at least one radio frequency channel at a unit time interval. Whether the handset unit is in an outer communication range from the base station is determined by a series the steps of: determining whether a hand shake error is periodically generated during communication; when the hand-shake error is generated, transmitting a link reestablishment request message to the base station; and reestablishing a radio link after the transmission of the link reestablishment request message and outputting an alarm tone indicating that the handset unit is in the outer communication range.

REFERENCES:
patent: 4939766 (1990-07-01), Umemoto et al.
patent: 4996715 (1991-02-01), Marui et al.
patent: 5032835 (1991-07-01), DeLuca
patent: 5049875 (1991-09-01), DeLuca et al.
patent: 5134708 (1992-07-01), Marui et al.
patent: 5193216 (1993-03-01), Davis
patent: 5203013 (1993-04-01), Breeden et al.
patent: 5243641 (1993-09-01), Evans et al.
patent: 5280541 (1994-01-01), Marko et al.
patent: 5327578 (1994-07-01), Breeden et al.
patent: 5373548 (1994-12-01), McCarthy
patent: 5426690 (1995-06-01), Hikuma et al.
patent: 5535205 (1996-07-01), Horii
patent: 5544224 (1996-08-01), Jonsson et al.
patent: 5644620 (1997-07-01), Shimura

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