JPS641358A - Hands-free telephone set - Google Patents
Hands-free telephone setInfo
- Publication number
- JPS641358A JPS641358A JP15550387A JP15550387A JPS641358A JP S641358 A JPS641358 A JP S641358A JP 15550387 A JP15550387 A JP 15550387A JP 15550387 A JP15550387 A JP 15550387A JP S641358 A JPS641358 A JP S641358A
- Authority
- JP
- Japan
- Prior art keywords
- hands
- transmitting
- led
- receiving
- connecting circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To make the function of hands-free talking effectively usable, by informing the user of a hands-free telephone set that whether the hands-free operation of the set is in the transmitting state or receiving state by using a transmitting-receiving state displaying means when hands-free talking is made.
CONSTITUTION: A sound level comparator circuit 40 compares signals inputted from rectifier circuits 30 and 60 with each other and detects that which is higher between the receiving sound level and transmitting sound level. Moreover, an LED controlling circuit 80 connected with a transmitting sound connecting circuit 70 and receiving sound connecting circuit 50 supplies an electric current to an LED (GN) so as to cause the green LED 90 (GN) to light while the transmitting sound connecting circuit operates and an electric current to another LED 90 (RD) so as to cause the LED 90 (RD) to light while the receiving sound connecting circuit operates. Therefore, whether the telephone set is in the transmitting state or in the receiving state can be confirmed through the LEDs 90 (RD and GN).
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-155503A JPH011358A (en) | 1987-06-24 | hands-free telephone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-155503A JPH011358A (en) | 1987-06-24 | hands-free telephone |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS641358A true JPS641358A (en) | 1989-01-05 |
JPH011358A JPH011358A (en) | 1989-01-05 |
Family
ID=
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