JPH0221187B2 - - Google Patents

Info

Publication number
JPH0221187B2
JPH0221187B2 JP4856081A JP4856081A JPH0221187B2 JP H0221187 B2 JPH0221187 B2 JP H0221187B2 JP 4856081 A JP4856081 A JP 4856081A JP 4856081 A JP4856081 A JP 4856081A JP H0221187 B2 JPH0221187 B2 JP H0221187B2
Authority
JP
Japan
Prior art keywords
line
relay
trunk
polarity
outgoing
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.)
Expired
Application number
JP4856081A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57162869A (en
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 JPS57162869A (en) 1982-10-06
JPH0221187B2 true JPH0221187B2 (enrdf_load_stackoverflow) 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 (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS57162869A (en) 1982-10-06

Similar Documents

Publication Publication Date Title
JPH09284428A (ja) 課金システム
JPH026477B2 (enrdf_load_stackoverflow)
JPH0221187B2 (enrdf_load_stackoverflow)
JP2523573B2 (ja) 電話装置
US2310481A (en) Two-way trunk circuit
JPS5855702Y2 (ja) 発呼検出装置
JP3067273B2 (ja) ボタン電話装置
JP2636219B2 (ja) 構内自動交換機
JP3129633B2 (ja) ノーリンギング通信システム
JP2773376B2 (ja) 構内交換機
JPS6342606Y2 (enrdf_load_stackoverflow)
JPH0122797B2 (enrdf_load_stackoverflow)
JPH07236165A (ja) 局線迂回方式
JPH0353830B2 (enrdf_load_stackoverflow)
JPH053779B2 (enrdf_load_stackoverflow)
JPH04264898A (ja) 局線着信接続方式
JPS6326578B2 (enrdf_load_stackoverflow)
JPH07107206A (ja) 通信制御方法及び装置
JPH02206958A (ja) 回線制御装置
JPS6084091A (ja) 局線着信接続方式
JPS63184444A (ja) 電話システム
JPS6072395A (ja) 構内用交換機の局線トランク装置
JPH06164758A (ja) ファクシミリ／電話自動切替装置
JPH0296451A (ja) 通信ネットワークの自動応答出合試験機
JPH01157695A (ja) トランク回路