JPS54505A - Identifying system of types of incoming lines - Google Patents

Identifying system of types of incoming lines

Info

Publication number
JPS54505A
JPS54505A JP6488377A JP6488377A JPS54505A JP S54505 A JPS54505 A JP S54505A JP 6488377 A JP6488377 A JP 6488377A JP 6488377 A JP6488377 A JP 6488377A JP S54505 A JPS54505 A JP S54505A
Authority
JP
Japan
Prior art keywords
types
identifying system
incoming lines
call
incoming
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
JP6488377A
Other languages
Japanese (ja)
Other versions
JPS5759995B2 (en
Inventor
Hiroshi Chikira
Yoshinori Tawara
Yukio Iino
Yuzo Masuda
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 JP6488377A priority Critical patent/JPS54505A/en
Publication of JPS54505A publication Critical patent/JPS54505A/en
Publication of JPS5759995B2 publication Critical patent/JPS5759995B2/ja
Granted 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:To perform the identification whether a call is an incoming call from the line capable of transferring a called number or not economically, by reading in the state of an incoming trunk via communication path in a malicious call retrieval unit.
JP6488377A 1977-06-03 1977-06-03 Identifying system of types of incoming lines Granted JPS54505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6488377A JPS54505A (en) 1977-06-03 1977-06-03 Identifying system of types of incoming lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6488377A JPS54505A (en) 1977-06-03 1977-06-03 Identifying system of types of incoming lines

Publications (2)

Publication Number Publication Date
JPS54505A true JPS54505A (en) 1979-01-05
JPS5759995B2 JPS5759995B2 (en) 1982-12-17

Family

ID=13270941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6488377A Granted JPS54505A (en) 1977-06-03 1977-06-03 Identifying system of types of incoming lines

Country Status (1)

Country Link
JP (1) JPS54505A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820359A (en) * 1987-03-12 1989-04-11 Westinghouse Electric Corp. Process for thermally stress-relieving a tube
JPH047382U (en) * 1990-05-02 1992-01-23

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112509A (en) * 1973-02-23 1974-10-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112509A (en) * 1973-02-23 1974-10-26

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820359A (en) * 1987-03-12 1989-04-11 Westinghouse Electric Corp. Process for thermally stress-relieving a tube
JPH047382U (en) * 1990-05-02 1992-01-23

Also Published As

Publication number Publication date
JPS5759995B2 (en) 1982-12-17

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