JPS57162869A - Line polarity detecting system - Google Patents

Line polarity detecting system

Info

Publication number
JPS57162869A
JPS57162869A JP4856081A JP4856081A JPS57162869A JP S57162869 A JPS57162869 A JP S57162869A JP 4856081 A JP4856081 A JP 4856081A JP 4856081 A JP4856081 A JP 4856081A JP S57162869 A JPS57162869 A JP S57162869A
Authority
JP
Japan
Prior art keywords
state
charging processing
called party
response
dialing
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
JP4856081A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0221187B2 (enExample
Inventor
Mitsuhiro Murata
Masaharu Yamamoto
Masami Tawara
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP4856081A priority Critical patent/JPS57162869A/ja
Publication of JPS57162869A publication Critical patent/JPS57162869A/ja
Publication of JPH0221187B2 publication Critical patent/JPH0221187B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/34—Charging, billing or metering arrangements for private branch exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Meter Arrangements (AREA)
JP4856081A 1981-03-31 1981-03-31 Line polarity detecting system Granted JPS57162869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4856081A JPS57162869A (en) 1981-03-31 1981-03-31 Line polarity detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4856081A JPS57162869A (en) 1981-03-31 1981-03-31 Line polarity detecting system

Publications (2)

Publication Number Publication Date
JPS57162869A true JPS57162869A (en) 1982-10-06
JPH0221187B2 JPH0221187B2 (enExample) 1990-05-14

Family

ID=12806765

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4856081A Granted JPS57162869A (en) 1981-03-31 1981-03-31 Line polarity detecting system

Country Status (1)

Country Link
JP (1) JPS57162869A (enExample)

Also Published As

Publication number Publication date
JPH0221187B2 (enExample) 1990-05-14

Similar Documents

Publication Publication Date Title
JPS56153859A (en) Pcm line switching device
JPS57162869A (en) Line polarity detecting system
JPS5439518A (en) Automatic selection system for transmission mode of facsimile unit
JPS5610771A (en) Automatic dialing device
JPS51121154A (en) Disconnection detection system for d-c transmission line
JPS5610790A (en) Signal decision system
JPS57145466A (en) Switchboard
JPS52141104A (en) Private talk system for telephone unit
JPS56161742A (en) Automatic detection method for faulty part in loop transmitting system
JPS5217041A (en) System for detecting a point on a transmission line where an abnormal state occurs
JPS56120235A (en) Line monitoring system
JPS5451702A (en) Automatic power supply cut-off circuit
JPS5220702A (en) Data terminal equipment
JPS52130217A (en) Detecting system for calling
JPS56128051A (en) Monitoring method of transmission system
JPS5799069A (en) Call display device in transfer telephone
JPS52123197A (en) Telephone mutual communication system for fire information facility be tween receiver and secondary receiver
JPS57162866A (en) Telephone concentrating response system
JPS53138614A (en) Duplicating interruption connecting control system
JPS5635566A (en) Observation data transmission system using subscriber telephone circuit
JPS5357905A (en) Detecting system for contact faulty location
JPS5242307A (en) Subscriber answering detection system
JPS57188172A (en) Urging signal transmission controller for public telephone set
JPS5428506A (en) Circuit control system for facsimile exchange
JPS5620365A (en) Fault detection system