JPS6454845A - Push-button dial telephone set with holding function - Google Patents
Push-button dial telephone set with holding functionInfo
- Publication number
- JPS6454845A JPS6454845A JP21183587A JP21183587A JPS6454845A JP S6454845 A JPS6454845 A JP S6454845A JP 21183587 A JP21183587 A JP 21183587A JP 21183587 A JP21183587 A JP 21183587A JP S6454845 A JPS6454845 A JP S6454845A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- holding
- generation circuit
- circuit
- switch
- 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 enable the same filter to be used for a holding tone signal or a PB signal, by driving a PB signal generation circuit or a holding tone generation circuit when a key input signal from a key-board or a holding signal from a holding switch is detected, and connecting it to the filter. CONSTITUTION:A change-over switch 6 which connects the output side of the PB signal generation circuit 5 or that of the holding tone generation circuit 4 to a filter circuit 7, and a detection circuit 3 to output a control signal which detects an input signal from a keyboard 2 or the holding signal from the holding switch 1, and drives the PB signal generation circuit 5 in respective case and also switches the change-over switch 6 to the output side of the PB signal generation circuit 5, or drives the holding tone generation circuit 4 and also switches the change-over switch 6 to the output side of the holding tone generation circuit 4 are provided. In such a way, it is possible to switch and connect respective circuit to the common filter 7 by the change-over switch 6 when detecting the holding signal or the key input signal by using the detection circuit 3, and to lower a manufacturing cost.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21183587A JPS6454845A (en) | 1987-08-25 | 1987-08-25 | Push-button dial telephone set with holding function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21183587A JPS6454845A (en) | 1987-08-25 | 1987-08-25 | Push-button dial telephone set with holding function |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6454845A true JPS6454845A (en) | 1989-03-02 |
Family
ID=16612376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21183587A Pending JPS6454845A (en) | 1987-08-25 | 1987-08-25 | Push-button dial telephone set with holding function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6454845A (en) |
-
1987
- 1987-08-25 JP JP21183587A patent/JPS6454845A/en active Pending
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