JPS6454845A - Push-button dial telephone set with holding function - Google Patents

Push-button dial telephone set with holding function

Info

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
Application number
JP21183587A
Other languages
Japanese (ja)
Inventor
Shoji Hirayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP21183587A priority Critical patent/JPS6454845A/en
Publication of JPS6454845A publication Critical patent/JPS6454845A/en
Pending legal-status Critical Current

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.
JP21183587A 1987-08-25 1987-08-25 Push-button dial telephone set with holding function Pending JPS6454845A (en)

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)

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