FI831404L - Digital oevervakningskrets foer telefonsystem - Google Patents

Digital oevervakningskrets foer telefonsystem

Info

Publication number
FI831404L
FI831404L FI831404A FI831404A FI831404L FI 831404 L FI831404 L FI 831404L FI 831404 A FI831404 A FI 831404A FI 831404 A FI831404 A FI 831404A FI 831404 L FI831404 L FI 831404L
Authority
FI
Finland
Prior art keywords
counter
digital
logic circuit
oevervakningskrets
telefonsystem
Prior art date
Application number
FI831404A
Other languages
English (en)
Other versions
FI831404A0 (fi
Inventor
William Thomas Cochran
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of FI831404A0 publication Critical patent/FI831404A0/fi
Publication of FI831404L publication Critical patent/FI831404L/fi

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • 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
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Selective Calling Equipment (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Telephonic Communication Services (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Alarm Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Manipulation Of Pulses (AREA)
FI831404A 1982-04-26 1983-04-25 Digital oevervakningskrets foer telefonsystem FI831404L (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/371,846 US4455456A (en) 1982-04-26 1982-04-26 Digital supervisory circuit for a telephone system

Publications (2)

Publication Number Publication Date
FI831404A0 FI831404A0 (fi) 1983-04-25
FI831404L true FI831404L (fi) 1983-10-27

Family

ID=23465641

Family Applications (1)

Application Number Title Priority Date Filing Date
FI831404A FI831404L (fi) 1982-04-26 1983-04-25 Digital oevervakningskrets foer telefonsystem

Country Status (29)

Country Link
US (1) US4455456A (fi)
EP (1) EP0092807B1 (fi)
JP (1) JPS58195353A (fi)
KR (1) KR880001651B1 (fi)
AT (1) ATE32409T1 (fi)
AU (1) AU557025B2 (fi)
BE (1) BE896561A (fi)
BR (1) BR8302051A (fi)
CA (1) CA1190678A (fi)
DD (1) DD220479A5 (fi)
DE (1) DE3375632D1 (fi)
DK (1) DK181383A (fi)
EG (1) EG15506A (fi)
ES (1) ES8404128A1 (fi)
FI (1) FI831404L (fi)
GR (1) GR78194B (fi)
HU (1) HU186273B (fi)
IN (1) IN157100B (fi)
MA (1) MA19780A1 (fi)
MX (1) MX153055A (fi)
NO (1) NO831424L (fi)
NZ (1) NZ203885A (fi)
PH (1) PH21028A (fi)
PL (1) PL241632A1 (fi)
PT (1) PT76580B (fi)
SU (1) SU1416065A3 (fi)
TR (1) TR21788A (fi)
YU (1) YU91583A (fi)
ZA (1) ZA832522B (fi)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU579749B2 (en) * 1982-03-24 1988-12-08 Alcatel Australia Limited A ring signal detector
DE3545574A1 (de) * 1985-12-21 1987-07-02 Philips Patentverwaltung Verfahren und schaltungsanordnung zur auswertung der ausgangssignale von stromflussdetektoren in fernmeldeanlagen
US4887071A (en) * 1988-08-18 1989-12-12 Siemens Transmission Systems, Inc. Digital activity loss detector
US5402482A (en) * 1991-07-08 1995-03-28 Fujitsu Limited Ring trip deciding circuit
JPH05130650A (ja) * 1991-11-07 1993-05-25 Fujitsu Ltd 有線回線におけるオンフツクトランスミツシヨン回路
JP2639304B2 (ja) * 1993-06-15 1997-08-13 日本電気株式会社 加入者回路
SE9400186D0 (sv) * 1994-01-21 1994-01-21 Ericsson Telefon Ab L M Förfarande i ett telekommunikationssystem
DE59510969D1 (de) * 1994-03-04 2004-12-30 Infineon Technologies Ag Verfahren zur störsicheren Abhebeerkennung bei Rufsignaleinspeisung in digitalen Fernsprechvermittlungseinrichtungen und Schaltungsanordnung zur Durchführung des Verfahrens
JPH08139802A (ja) * 1994-11-10 1996-05-31 Fujitsu Ltd リングトリップ判定回路
US5694465A (en) * 1995-03-16 1997-12-02 Advanced Micro Devices, Inc. Integrated ringer for short telephone lines

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772477A (en) * 1972-07-17 1973-11-13 Bell Telephone Labor Inc Telephone dial pulse detection circuit
GB1479094A (en) * 1975-03-25 1977-07-06 Standard Telephones Cables Ltd Ring trip detectors
US4087646A (en) * 1977-01-28 1978-05-02 Bell Telephone Laboratories, Incorporated Dual mode telephone subscriber loop current detector
US4132864A (en) * 1977-04-28 1979-01-02 International Business Machines Corporation Digital measurement of the DC value in an AC signal adapted to telephone off-hook detection
IT1128374B (it) * 1980-02-19 1986-05-28 Cselt Centro Studi Lab Telecom Circuito telefonico per la generazione del ritmo di suoneria ed il riconoscimento dello sgancio
US4349703A (en) * 1980-03-31 1982-09-14 International Telephone And Telegraph Corporation Programmable ring signal generator

Also Published As

Publication number Publication date
NZ203885A (en) 1986-04-11
BR8302051A (pt) 1983-12-27
HU186273B (en) 1985-07-29
ES521845A0 (es) 1984-04-01
EP0092807A2 (en) 1983-11-02
KR880001651B1 (ko) 1988-09-03
ATE32409T1 (de) 1988-02-15
SU1416065A3 (ru) 1988-08-07
AU557025B2 (en) 1986-12-04
DE3375632D1 (en) 1988-03-10
ES8404128A1 (es) 1984-04-01
GR78194B (fi) 1984-09-26
MA19780A1 (fr) 1983-12-31
KR840004841A (ko) 1984-10-24
MX153055A (es) 1986-07-22
JPS58195353A (ja) 1983-11-14
EG15506A (en) 1986-09-30
EP0092807A3 (en) 1985-01-09
AU1367783A (en) 1983-11-03
US4455456A (en) 1984-06-19
TR21788A (tr) 1985-07-15
CA1190678A (en) 1985-07-16
IN157100B (fi) 1986-01-18
DK181383A (da) 1983-10-27
EP0092807B1 (en) 1988-02-03
BE896561A (fr) 1983-10-26
DD220479A5 (de) 1985-03-27
NO831424L (no) 1983-10-27
FI831404A0 (fi) 1983-04-25
ZA832522B (en) 1984-01-25
YU91583A (en) 1986-04-30
PT76580B (en) 1985-12-16
PL241632A1 (en) 1984-03-26
PT76580A (en) 1983-05-01
PH21028A (en) 1987-06-30
DK181383D0 (da) 1983-04-25

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Legal Events

Date Code Title Description
FD Application lapsed

Owner name: INTERNATIONAL STANDARD ELECTRIC CO