JPS52140208A - Urgent call service system - Google Patents

Urgent call service system

Info

Publication number
JPS52140208A
JPS52140208A JP5649376A JP5649376A JPS52140208A JP S52140208 A JPS52140208 A JP S52140208A JP 5649376 A JP5649376 A JP 5649376A JP 5649376 A JP5649376 A JP 5649376A JP S52140208 A JPS52140208 A JP S52140208A
Authority
JP
Japan
Prior art keywords
special
trunk
call service
special trunk
urgent call
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
JP5649376A
Other languages
Japanese (ja)
Inventor
Masaru Takamiko
Toshio Ishida
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 JP5649376A priority Critical patent/JPS52140208A/en
Publication of JPS52140208A publication Critical patent/JPS52140208A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Meter Arrangements (AREA)

Abstract

PURPOSE:To special number for the urgent call service is sent to ranslator TLR instead of the called subscriber number, and the route information of the special trunk is produced to secure a connection between calling subscriber SUB(A) and special trunk STRK. After this, the special trunk receives and memorizes the called subscriber number information. At the same time, the transmission from general subcribers becomes possible even at the control time by performing the succeeding controls, etc. by multi-frequency sender. For the toll transmission exchange, the call becomes possible if the idle circuit is provided inj order to store the class of special trunk to the preference class.
JP5649376A 1976-05-19 1976-05-19 Urgent call service system Pending JPS52140208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5649376A JPS52140208A (en) 1976-05-19 1976-05-19 Urgent call service system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5649376A JPS52140208A (en) 1976-05-19 1976-05-19 Urgent call service system

Publications (1)

Publication Number Publication Date
JPS52140208A true JPS52140208A (en) 1977-11-22

Family

ID=13028609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5649376A Pending JPS52140208A (en) 1976-05-19 1976-05-19 Urgent call service system

Country Status (1)

Country Link
JP (1) JPS52140208A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54127206A (en) * 1978-03-27 1979-10-03 Nec Corp Emergency processing system
EP0700222A2 (en) 1994-08-31 1996-03-06 Nippon Telegraph And Telephone Corporation Call selecting apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54127206A (en) * 1978-03-27 1979-10-03 Nec Corp Emergency processing system
JPS6130459B2 (en) * 1978-03-27 1986-07-14 Nippon Electric Co
EP0700222A2 (en) 1994-08-31 1996-03-06 Nippon Telegraph And Telephone Corporation Call selecting apparatus

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