JPS6439898A - Private branch exchange equipped with extension calling function - Google Patents

Private branch exchange equipped with extension calling function

Info

Publication number
JPS6439898A
JPS6439898A JP19678287A JP19678287A JPS6439898A JP S6439898 A JPS6439898 A JP S6439898A JP 19678287 A JP19678287 A JP 19678287A JP 19678287 A JP19678287 A JP 19678287A JP S6439898 A JPS6439898 A JP S6439898A
Authority
JP
Japan
Prior art keywords
calling
extension
telephone set
tone
extension telephone
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
JP19678287A
Other languages
Japanese (ja)
Inventor
Junko Sakamoto
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 Engineering Ltd
Original Assignee
NEC Engineering Ltd
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 Engineering Ltd filed Critical NEC Engineering Ltd
Priority to JP19678287A priority Critical patent/JPS6439898A/en
Publication of JPS6439898A publication Critical patent/JPS6439898A/en
Pending legal-status Critical Current

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To execute a confirmation to a waiting person by equipping a means to detect a hooking in a calling mutually between extensions and a means to send a loud tone for calling the extension with the succeeding dial operation of a special number. CONSTITUTION:A central control unit 7, which receives a notification from a line circuit 3 to detect the hooking of a first extension telephone set 1, connects the first line circuit 3 and an outgoing register 6 through a main switch 5. Continuously, when dial information which is dialed are discriminated to be the special number for an extension calling by the user of the first extension telephone set 1, the outgoing register 6 is restored to be original. The central control unit 7 sends a ring-back tone, which is a normal calling tone, to the first extension telephone set 1 by using a first equipment 8 for sending various types of tones. To a second extension telephone set 2, the calling tone, which is louder than a second equipment 9 for sending various types of tones, is sent during a constant time and a first extension calling is notified.
JP19678287A 1987-08-05 1987-08-05 Private branch exchange equipped with extension calling function Pending JPS6439898A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19678287A JPS6439898A (en) 1987-08-05 1987-08-05 Private branch exchange equipped with extension calling function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19678287A JPS6439898A (en) 1987-08-05 1987-08-05 Private branch exchange equipped with extension calling function

Publications (1)

Publication Number Publication Date
JPS6439898A true JPS6439898A (en) 1989-02-10

Family

ID=16363542

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19678287A Pending JPS6439898A (en) 1987-08-05 1987-08-05 Private branch exchange equipped with extension calling function

Country Status (1)

Country Link
JP (1) JPS6439898A (en)

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