JPS5231604A - Toll call control system by call-back link - Google Patents

Toll call control system by call-back link

Info

Publication number
JPS5231604A
JPS5231604A JP10691475A JP10691475A JPS5231604A JP S5231604 A JPS5231604 A JP S5231604A JP 10691475 A JP10691475 A JP 10691475A JP 10691475 A JP10691475 A JP 10691475A JP S5231604 A JPS5231604 A JP S5231604A
Authority
JP
Japan
Prior art keywords
call
back link
control system
toll
call control
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
JP10691475A
Other languages
Japanese (ja)
Other versions
JPS5548756B2 (en
Inventor
Masatoshi Kosuge
Masaki Komatsu
Hiroyuki Tanaka
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.)
NIPPO TSUSHIN KOGYO KK
NITSUPOU TSUUSHIN KOUGIYOU KK
Original Assignee
NIPPO TSUSHIN KOGYO KK
NITSUPOU TSUUSHIN KOUGIYOU KK
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 NIPPO TSUSHIN KOGYO KK, NITSUPOU TSUUSHIN KOUGIYOU KK filed Critical NIPPO TSUSHIN KOGYO KK
Priority to JP10691475A priority Critical patent/JPS5231604A/en
Publication of JPS5231604A publication Critical patent/JPS5231604A/en
Publication of JPS5548756B2 publication Critical patent/JPS5548756B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/38—Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:Improvement of the impulse characteristic of the office trunk as well as the speech quality by giving the disconnect instructions to the office trunk through the call-back link.
JP10691475A 1975-09-05 1975-09-05 Toll call control system by call-back link Granted JPS5231604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10691475A JPS5231604A (en) 1975-09-05 1975-09-05 Toll call control system by call-back link

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10691475A JPS5231604A (en) 1975-09-05 1975-09-05 Toll call control system by call-back link

Publications (2)

Publication Number Publication Date
JPS5231604A true JPS5231604A (en) 1977-03-10
JPS5548756B2 JPS5548756B2 (en) 1980-12-08

Family

ID=14445684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10691475A Granted JPS5231604A (en) 1975-09-05 1975-09-05 Toll call control system by call-back link

Country Status (1)

Country Link
JP (1) JPS5231604A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769531U (en) * 1980-10-16 1982-04-26
JPS5796636U (en) * 1980-12-05 1982-06-14
JPS57177426U (en) * 1981-05-07 1982-11-10
JPS58150926U (en) * 1982-04-02 1983-10-08 井関農機株式会社 Grain culm lifting device in reaping harvester
JPS58176628U (en) * 1982-05-14 1983-11-26 ヤンマー農機株式会社 Grain culm weeding device of reaper
JPS6038530U (en) * 1983-08-23 1985-03-16 セイレイ工業株式会社 lifting device

Also Published As

Publication number Publication date
JPS5548756B2 (en) 1980-12-08

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