JPH0342534B2 - - Google Patents

Info

Publication number
JPH0342534B2
JPH0342534B2 JP56046582A JP4658281A JPH0342534B2 JP H0342534 B2 JPH0342534 B2 JP H0342534B2 JP 56046582 A JP56046582 A JP 56046582A JP 4658281 A JP4658281 A JP 4658281A JP H0342534 B2 JPH0342534 B2 JP H0342534B2
Authority
JP
Japan
Prior art keywords
ringing
signal
line
ringing signal
circuit
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 - Lifetime
Application number
JP56046582A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56152361A (en
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 filed Critical
Publication of JPS56152361A publication Critical patent/JPS56152361A/ja
Publication of JPH0342534B2 publication Critical patent/JPH0342534B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephone Function (AREA)
  • Optical Communication System (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
JP4658281A 1980-03-31 1981-03-31 Analog subscriber/repeater module with distributed call signal source and call trip Granted JPS56152361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13575680A 1980-03-31 1980-03-31

Publications (2)

Publication Number Publication Date
JPS56152361A JPS56152361A (en) 1981-11-25
JPH0342534B2 true JPH0342534B2 (enExample) 1991-06-27

Family

ID=22469517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4658281A Granted JPS56152361A (en) 1980-03-31 1981-03-31 Analog subscriber/repeater module with distributed call signal source and call trip

Country Status (11)

Country Link
EP (1) EP0037540B1 (enExample)
JP (1) JPS56152361A (enExample)
AT (1) ATE17294T1 (enExample)
AU (1) AU541648B2 (enExample)
BE (1) BE888193A (enExample)
BR (1) BR8101844A (enExample)
CA (1) CA1172737A (enExample)
DE (1) DE3173346D1 (enExample)
ES (1) ES500922A0 (enExample)
MX (1) MX150197A (enExample)
NO (1) NO155598C (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128449B (en) * 1982-10-08 1985-12-11 Standard Telephones Cables Ltd Tone generation circuit
US4656659A (en) * 1985-07-18 1987-04-07 Itt Corporation Programmable ring signal generator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2129281A5 (enExample) * 1971-03-11 1972-10-27 Ibm France
US4097694A (en) * 1975-07-09 1978-06-27 Toa Electric Company, Ltd. Time-division telephone system embodying trunks having demodulating-adder circuits
JPS53124008A (en) * 1977-04-06 1978-10-30 Oki Electric Ind Co Ltd Call signal transmission system

Also Published As

Publication number Publication date
EP0037540B1 (de) 1986-01-02
ATE17294T1 (de) 1986-01-15
BR8101844A (pt) 1981-10-06
AU541648B2 (en) 1985-01-17
CA1172737A (en) 1984-08-14
NO155598C (no) 1987-04-22
MX150197A (es) 1984-03-29
NO811094L (no) 1981-10-01
NO155598B (no) 1987-01-12
ES8206125A1 (es) 1982-08-16
ES500922A0 (es) 1982-08-16
DE3173346D1 (en) 1986-02-13
EP0037540A2 (de) 1981-10-14
AU6876581A (en) 1981-10-08
JPS56152361A (en) 1981-11-25
EP0037540A3 (en) 1982-09-15
BE888193A (nl) 1981-09-30

Similar Documents

Publication Publication Date Title
US4853949A (en) Fail safe voice system for integrated services for digital network subscribers
US5430717A (en) Digital electronic loop crossconnect and carrier system
US4232199A (en) Special services add-on for dial pulse activated telephone switching office
US4435803A (en) Analog subscriber/trunk module with shared ringing source and ring-trip
US5530951A (en) Telephone line sharing apparatus
CA2042676C (en) Ringing signal control circuit for an enhanced subscriber line interface
JPH0342534B2 (enExample)
US6278778B1 (en) System and method of power limiting call processing in telecommunications equipment
CA1261495A (en) Line terminating apparatus
US5459772A (en) External apparatus for monitoring a communication system
US5675643A (en) Line card that provides remote line activation and soft dialtone
JPS6337999B2 (enExample)
EP0233457B1 (en) Improvements to an operation control system of one or more apparatuses
Manfred et al. Loop plant electronics: Digital loop carrier systems
JP3357957B2 (ja) １１９通報回線応答方式
JPH0256165A (ja) 端末中継装置
JPH0342790Y2 (enExample)
JP3088872B2 (ja) 構内電話交換機及び局線障害検出装置
JPH11355869A (ja) 大容量電子交換装置及び方法
SU432687A1 (ru) Устройство для опознаваниявызывающих абонентовкоммутационных станций на сетяхпередачи дискретных сигналов
JP2979597B2 (ja) 多方向多重通信システムの中継局
JPH0258497A (ja) 通信システム
JPH0338955A (ja) リンギング信号送出の制御方式
GB2074814A (en) Reduction of operator involvement in SVI/CNI calls
JPH04235446A (ja) リンガ負荷制御方式