JPS6471253A - Telephone set - Google Patents

Telephone set

Info

Publication number
JPS6471253A
JPS6471253A JP22781787A JP22781787A JPS6471253A JP S6471253 A JPS6471253 A JP S6471253A JP 22781787 A JP22781787 A JP 22781787A JP 22781787 A JP22781787 A JP 22781787A JP S6471253 A JPS6471253 A JP S6471253A
Authority
JP
Japan
Prior art keywords
timer
time
dial
till
last
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
JP22781787A
Other languages
Japanese (ja)
Inventor
Inao Fujita
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 JP22781787A priority Critical patent/JPS6471253A/en
Publication of JPS6471253A publication Critical patent/JPS6471253A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent a long time call by cutting off the connection when a preset time elapses after the start of talking, storing a number dialed last and inhibiting the reconnection to the stored number till a prescribed time elapses. CONSTITUTION:When a telephone set 1 is hooked off, dialed and a dial signal is sent (21) and an opposite party replies thereto, then the polarity inversion of a line 3 is detected (15) to start a timer 16. When a prescribed time set to the timer 16 expires, an open circuit disconnects the line 3 from the telephone set 1. The timer 16 displays (17) the elapsed time and a prediction tone is generated (23) before one minute of the set time. The open circuit 12 holds the line opening till an on-hook signal (a) comes from an off-hook detection circuit 14. Even when the same dial as the last dial stored in a last dial memory 19 is given, till the set time of the timer 20 elapses, a collation circuit 18 makes the dialing invalid. Thus, a long time call is prevented and the disturbance to an urgent call from the 3rd party is excluded.
JP22781787A 1987-09-11 1987-09-11 Telephone set Pending JPS6471253A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22781787A JPS6471253A (en) 1987-09-11 1987-09-11 Telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22781787A JPS6471253A (en) 1987-09-11 1987-09-11 Telephone set

Publications (1)

Publication Number Publication Date
JPS6471253A true JPS6471253A (en) 1989-03-16

Family

ID=16866841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22781787A Pending JPS6471253A (en) 1987-09-11 1987-09-11 Telephone set

Country Status (1)

Country Link
JP (1) JPS6471253A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004422A1 (en) * 1993-07-30 1995-02-09 Rauland-Borg Corporation Method and apparatus for limiting the duration of a telephone call
US5454033A (en) * 1993-08-02 1995-09-26 Rauland-Borg Corporation Apparatus and method for controlling access to a telephone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004422A1 (en) * 1993-07-30 1995-02-09 Rauland-Borg Corporation Method and apparatus for limiting the duration of a telephone call
US5454033A (en) * 1993-08-02 1995-09-26 Rauland-Borg Corporation Apparatus and method for controlling access to a telephone

Similar Documents

Publication Publication Date Title
US4417100A (en) Emergency dialer system
GB1379805A (en) Telephone substation automatic operating system
CA2231006A1 (en) Telephone line automatic prefix dialer
EP0284324A3 (en) Radio telephones
US4737981A (en) Telephone control device
US4201896A (en) Telephone polling apparatus using a plurality of timers to detect the line conditions
US4813067A (en) Apparatus for connecting selectively a telephone answering device or additional equipment, such as a facsimile machine, to telephone lines
JPS6471253A (en) Telephone set
GB1335999A (en) Timer cirucit of an automatic telephone answering apparatus
JPS5787666A (en) Simple automatic answering telephone system
JPS5564465A (en) Automatic answering telephone set
JPS644157A (en) Facsimile/telephone automatic changeover system
JPS6473852A (en) Automatic voice mail switching system
KR960020235A (en) How to Dial Automatically
JPS5613866A (en) Communication device
JPS6471264A (en) Telephone/facsimile switching equipment
JPS55133166A (en) Automatic answering telephone set
JPS55135461A (en) Starting system for terminal unit
JPS6432748A (en) Telephone system
GB2236455A (en) Automatic telephone alarm
SU809650A1 (en) Device for automatic calling of subscribers
JPS6437150A (en) Automatic reoriginating telephone set
JPS5787655A (en) Telephone set
JPH0244952A (en) Telephone accessory coping with troublesome call
JPS6429052A (en) Line switcher