JPS5233407A - Automatic telephone exchange trunk closing system - Google Patents

Automatic telephone exchange trunk closing system

Info

Publication number
JPS5233407A
JPS5233407A JP10903275A JP10903275A JPS5233407A JP S5233407 A JPS5233407 A JP S5233407A JP 10903275 A JP10903275 A JP 10903275A JP 10903275 A JP10903275 A JP 10903275A JP S5233407 A JPS5233407 A JP S5233407A
Authority
JP
Japan
Prior art keywords
telephone exchange
closing system
automatic telephone
exchange trunk
trunk closing
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.)
Granted
Application number
JP10903275A
Other languages
Japanese (ja)
Other versions
JPS5834989B2 (en
Inventor
Yukio Otaka
Tadashi Nakamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10903275A priority Critical patent/JPS5834989B2/en
Publication of JPS5233407A publication Critical patent/JPS5233407A/en
Publication of JPS5834989B2 publication Critical patent/JPS5834989B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Structure Of Telephone Exchanges (AREA)

Abstract

PURPOSE: Switching on and off for a communicating line can simply be performed by utilizing a combination of micro-switches and packages.
COPYRIGHT: (C)1977,JPO&Japio
JP10903275A 1975-09-10 1975-09-10 Trunk Heiseoku Hoshiki Expired JPS5834989B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10903275A JPS5834989B2 (en) 1975-09-10 1975-09-10 Trunk Heiseoku Hoshiki

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10903275A JPS5834989B2 (en) 1975-09-10 1975-09-10 Trunk Heiseoku Hoshiki

Publications (2)

Publication Number Publication Date
JPS5233407A true JPS5233407A (en) 1977-03-14
JPS5834989B2 JPS5834989B2 (en) 1983-07-30

Family

ID=14499870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10903275A Expired JPS5834989B2 (en) 1975-09-10 1975-09-10 Trunk Heiseoku Hoshiki

Country Status (1)

Country Link
JP (1) JPS5834989B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104213A (en) * 1978-02-02 1979-08-16 Fujitsu Ltd Function addition system for trunk of electronic switchboard
JPS60204153A (en) * 1984-03-29 1985-10-15 Nec Corp Automatic closing system of digital announcement device
JPS6310851A (en) * 1986-07-01 1988-01-18 Nec Corp Automatic sending system for switchboard blocking signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104213A (en) * 1978-02-02 1979-08-16 Fujitsu Ltd Function addition system for trunk of electronic switchboard
JPS60204153A (en) * 1984-03-29 1985-10-15 Nec Corp Automatic closing system of digital announcement device
JPS6310851A (en) * 1986-07-01 1988-01-18 Nec Corp Automatic sending system for switchboard blocking signal

Also Published As

Publication number Publication date
JPS5834989B2 (en) 1983-07-30

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