JPS558151A - Public charging local trunk - Google Patents

Public charging local trunk

Info

Publication number
JPS558151A
JPS558151A JP8088978A JP8088978A JPS558151A JP S558151 A JPS558151 A JP S558151A JP 8088978 A JP8088978 A JP 8088978A JP 8088978 A JP8088978 A JP 8088978A JP S558151 A JPS558151 A JP S558151A
Authority
JP
Japan
Prior art keywords
call
connection
outgoing
trunk
tandem
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
JP8088978A
Other languages
Japanese (ja)
Other versions
JPS579270B2 (en
Inventor
Toshihiko Umeda
Nobuo Tsuchie
Teruo Hasegawa
Ikuo Kawatani
Shinichi Maeno
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Oki Electric Industry Co Ltd
NTT Inc
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon Electric Co 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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP8088978A priority Critical patent/JPS558151A/en
Publication of JPS558151A publication Critical patent/JPS558151A/en
Publication of JPS579270B2 publication Critical patent/JPS579270B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
    • H04Q3/0012—Selecting arrangements using relay selectors in the switching stages in which the relays are arranged in a matrix configuration

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Meter Arrangements (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To improve the call loss and the attenuation distortion by realizing both the public local connection call and the public outgoing connection call formed with the loop round connection of the general outgoing trunk and the tandem outgoing trunk through each different pattern state. CONSTITUTION:In the state of pattern ''2'' in the Karnaugh map, only pattern relay T operates. This suited for execution of the outgoing connection call to the tandem outgoing trunk through the loop round connection. Under these conditions, the preceding monitor and charging pulse sending circuit 1 are just inserted between call lines A and B of public charging local trunk IOT-CH8, and call capacitor C3 is by-passed by T contacts t2 and t3. And next monitor relay 2 is cut off from A and B via T contacts t0 and t1. Accordingly, no overlap is caused between circuits 1 and 2 plus C3 when the outgoing connection call is given between IOT-CH and the tandem outgoing trunk, and the connection is given between two trunks 7 and 8. As a result, both the call loss and the attenuation distortion can be improved for the long-distance call which is performed via the tandem outgoing trunk.
JP8088978A 1978-07-05 1978-07-05 Public charging local trunk Granted JPS558151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8088978A JPS558151A (en) 1978-07-05 1978-07-05 Public charging local trunk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8088978A JPS558151A (en) 1978-07-05 1978-07-05 Public charging local trunk

Publications (2)

Publication Number Publication Date
JPS558151A true JPS558151A (en) 1980-01-21
JPS579270B2 JPS579270B2 (en) 1982-02-20

Family

ID=13730909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8088978A Granted JPS558151A (en) 1978-07-05 1978-07-05 Public charging local trunk

Country Status (1)

Country Link
JP (1) JPS558151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985799A (en) * 1987-10-08 1991-01-15 Hitachi Maxell, Ltd. Disk cartridge with improved disk cleaning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4985799A (en) * 1987-10-08 1991-01-15 Hitachi Maxell, Ltd. Disk cartridge with improved disk cleaning

Also Published As

Publication number Publication date
JPS579270B2 (en) 1982-02-20

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