JPS5276805A - Telephone service system - Google Patents

Telephone service system

Info

Publication number
JPS5276805A
JPS5276805A JP15281275A JP15281275A JPS5276805A JP S5276805 A JPS5276805 A JP S5276805A JP 15281275 A JP15281275 A JP 15281275A JP 15281275 A JP15281275 A JP 15281275A JP S5276805 A JPS5276805 A JP S5276805A
Authority
JP
Japan
Prior art keywords
service system
telephone service
congestion state
abnormal congestion
providing
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
JP15281275A
Other languages
Japanese (ja)
Inventor
Tomonori Sugiyama
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 JP15281275A priority Critical patent/JPS5276805A/en
Publication of JPS5276805A publication Critical patent/JPS5276805A/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
    • H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages

Landscapes

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

Abstract

PURPOSE:To reduce the abnormal congestion state in the service network greatly by providing an abnormal congestion state signal receiving division in an originating station.
JP15281275A 1975-12-23 1975-12-23 Telephone service system Pending JPS5276805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15281275A JPS5276805A (en) 1975-12-23 1975-12-23 Telephone service system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15281275A JPS5276805A (en) 1975-12-23 1975-12-23 Telephone service system

Publications (1)

Publication Number Publication Date
JPS5276805A true JPS5276805A (en) 1977-06-28

Family

ID=15548681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15281275A Pending JPS5276805A (en) 1975-12-23 1975-12-23 Telephone service system

Country Status (1)

Country Link
JP (1) JPS5276805A (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
JPS58221550A (en) * 1982-06-18 1983-12-23 Oki Electric Ind Co Ltd Automatic information transmission controlling system under control

Cited By (4)

* 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
JPS58221550A (en) * 1982-06-18 1983-12-23 Oki Electric Ind Co Ltd Automatic information transmission controlling system under control
JPH0249585B2 (en) * 1982-06-18 1990-10-30 Oki Denki Kogyo Kk

Similar Documents

Publication Publication Date Title
HK44077A (en) Method for frequency-recognition in selective signal receivers for use in telecommunication, particularly telephone systems
JPS5283101A (en) Intercept system for incapable communication
JPS5276805A (en) Telephone service system
JPS5362404A (en) Incoming call charging system
JPS522106A (en) Loop around connection control system
JPS5228810A (en) Automatic telephone exchange system
JPS5362902A (en) Selection system for switching office
JPS5360506A (en) Circuit control system
JPS523319A (en) Crosstalk reduction system
JPS5351904A (en) Subscriber circuit system both for telephone and data
JPS5279707A (en) Key telephone main unit
JPS52140207A (en) Telephone service system
JPS5372514A (en) Fault detector of repeater
JPS5358705A (en) Switching system for transmission line
JPS5297609A (en) Abnormal traffic detection system
JPS5399707A (en) Originating number display system
JPS53139412A (en) Trunk circuit
JPS526006A (en) Automatic call in accounting system
JPS53113404A (en) Operator board connection system in automatic exchanger
JPS5432908A (en) Main wire centralized ringing device for telephone
JPS5428507A (en) Mutual connection identifying system between
JPS549516A (en) Fault reception system
JPS5436112A (en) Remote test system for non-attendant station
JPS51147905A (en) Busy indication circuit in a switch-box type additional telephone set
JPS5342508A (en) Automatic test system for telephone lines