JPS5248901A - Trunk line trunk control system - Google Patents

Trunk line trunk control system

Info

Publication number
JPS5248901A
JPS5248901A JP12436975A JP12436975A JPS5248901A JP S5248901 A JPS5248901 A JP S5248901A JP 12436975 A JP12436975 A JP 12436975A JP 12436975 A JP12436975 A JP 12436975A JP S5248901 A JPS5248901 A JP S5248901A
Authority
JP
Japan
Prior art keywords
trunk
control system
way
case
line
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
JP12436975A
Other languages
Japanese (ja)
Inventor
Goro Hanada
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 JP12436975A priority Critical patent/JPS5248901A/en
Publication of JPS5248901A publication Critical patent/JPS5248901A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

PURPOSE:The main trunk is installed between intermediate stantions. In this way, two-way connection is made possible between mutual plural directions even in the case of key telephone as well as circuit utilization efficiency is increased in economical way even in the case of exchange unit containing common control function.
JP12436975A 1975-10-17 1975-10-17 Trunk line trunk control system Pending JPS5248901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12436975A JPS5248901A (en) 1975-10-17 1975-10-17 Trunk line trunk control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12436975A JPS5248901A (en) 1975-10-17 1975-10-17 Trunk line trunk control system

Publications (1)

Publication Number Publication Date
JPS5248901A true JPS5248901A (en) 1977-04-19

Family

ID=14883684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12436975A Pending JPS5248901A (en) 1975-10-17 1975-10-17 Trunk line trunk control system

Country Status (1)

Country Link
JP (1) JPS5248901A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058455A (en) * 1983-09-09 1985-04-04 Japan Atom Energy Res Inst Rubber composition having heat resistance and radiation resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058455A (en) * 1983-09-09 1985-04-04 Japan Atom Energy Res Inst Rubber composition having heat resistance and radiation resistance

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