Title:
【発明の名称】コードレス電話装置
Document Type and Number:
Japanese Patent JP2806804
Kind Code:
B2
Abstract:
A cordless telephone instrument is improved in that, even when a portable unit is not in use, it can be determined and notified to the user whether the portable unit is inside or outside of an operational area of the portable unit. In portable unit 2, portable unit timer 28 counts a predetermined first reference time and outputs a time-out signal for each first reference time. Every time the time-out signal is outputted, a registration signal is transmitted from portable unit radio circuit 21 toward a fixed unit. When the registration signal is received by fixed unit radio section 12, fixed unit 1 transmits a response signal toward portable unit 2. Portable unit 2 continuously operates to receive a response signal. However, when no response signal is detected within a counting time of portable unit timer 28, operational area out alarm generation section 27 is activated under the control of portable unit control circuit 24 to perform an operation of notifying that portable unit 2 is outside of the operational area.
More Like This:
| JP2006211562 | VOICE MEMO SYSTEM |
| JP3837043 | TELEPHONE SET |
| WO/2018/154946 | CONTROL DEVICE, TERMINAL DEVICE, CRADLE, NOTIFICATION SYSTEM, CONTROL METHOD AND CONTROL PROGRAM |
Inventors:
Yukihiro Shimura
Application Number:
JP17172094A
Publication Date:
September 30, 1998
Filing Date:
June 30, 1994
Export Citation:
Assignee:
NEC
International Classes:
H04M1/00; H04M1/72516; H04M1/72502; H04W24/06; H04W84/10; H04W88/02; (IPC1-7): H04Q7/38
Domestic Patent References:
| JP62159531A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)