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EP0435775A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Cordless telephone

Assignee: Sony Corp
•
Filing: 1990-12-27
•
Granted: —
•
Expires: 2010-12-27
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Abstract

Abstract The present invention relates to a cordless telephone (1, 2). In this cordless telephone, when a hold mode (i.e. during telephone conversation, the connected state of a telephone network line (3) is maintained by depressing a hold key (133) in order to interrupt the telephone conversation with the other party and a melody sound is transmitted to the called phone during the hold mode) is continued during a predetermined period, a remote station (1) (i.e. handset unit) is released from the hold mode by executing predetermined processings and the remote station is placed in the standby mode, thereby saving the consumption of power of a battery (151) incorporated in the remote station.

Inventors

  • 👤 Masato Yamagata
  • 👤 Yoshikazu Tanaka
  • 👤 Keizo Tsukada

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 21:52
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/73; H04M1/72502; H04M1/72505; H04M1/72513; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0216; Y; Y02; Y02D; Y02D30/00; Y02D30/70

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 101 words
In a cordless telephone in which during telephone communication a communication channel is opened between a remote station and a master station by a radio wave and said master station is connected to a telephone line network thereby to perform a telephone communication between said remote station and a third party, said cordless telephone arranged such that during hold mode, said communication channel between said master station and said remote station is monitored during a predetermined period after said hold mode; and said remote station is moved to a standby mode after said predetermined time is passed in said hold mode.
Claim 2
Dependent Claim 161 words
In a cordless telephone in which during telephone communication a communication channel is opened between a remote station and a master station by a radio wave and said master station is connected to a telephone line network thereby to perform a telephone communication between said remote station and a third party, said cordless telephone arranged such that when a hold mode operation is made on said master station, said master station is placed in the hold mode; said master station opens a communication channel between it and said remote station and transmits a hold mode changing control signal to said remote station; when receiving said hold mode changing control signal, said remote station is placed in said hold mode; said communication channel opened between said master station and said remote station is monitored during a predetermined period after said hold mode; and said remote station is moved to a standby mode after said predetermined time is passed in said hold mode.

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