EG15506A - A digital supervisory circuit for a telephone system - Google Patents

A digital supervisory circuit for a telephone system

Info

Publication number
EG15506A
EG15506A EG260/83A EG26083A EG15506A EG 15506 A EG15506 A EG 15506A EG 260/83 A EG260/83 A EG 260/83A EG 26083 A EG26083 A EG 26083A EG 15506 A EG15506 A EG 15506A
Authority
EG
Egypt
Prior art keywords
counter
logic circuit
exceeded
threshold
supervisory
Prior art date
Application number
EG260/83A
Other languages
English (en)
Inventor
T Cochran William
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
Application granted granted Critical
Publication of EG15506A publication Critical patent/EG15506A/xx

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)
EG260/83A 1982-04-26 1983-04-26 A digital supervisory circuit for a telephone system EG15506A (en)

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 (1)

Publication Number Publication Date
EG15506A true EG15506A (en) 1986-09-30

Family

ID=23465641

Family Applications (1)

Application Number Title Priority Date Filing Date
EG260/83A EG15506A (en) 1982-04-26 1983-04-26 A digital supervisory circuit for a telephone system

Country Status (29)

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

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
FI831404L (fi) 1983-10-27
ES8404128A1 (es) 1984-04-01
GR78194B (da) 1984-09-26
MA19780A1 (fr) 1983-12-31
KR840004841A (ko) 1984-10-24
MX153055A (es) 1986-07-22
JPS58195353A (ja) 1983-11-14
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 (da) 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

Similar Documents

Publication Publication Date Title
DE2966268D1 (en) A switching circuit
EG15506A (en) A digital supervisory circuit for a telephone system
GB1396644A (en) Control systems
GB1504177A (en) Dictation system
ES8405218A1 (es) Circuito para reajustar un circuito logico digital
EP0116291A3 (en) Ring trip detection system
ES457077A1 (es) Perfeccionamientos en circuitos de decision de densidad de informacion para sistemas de transmision fototelegrafica.
EP0389936A3 (en) Level and edge sensitive input circuit
ES293102A1 (es) Un sistema para comunicar una senal de datos
JPS57131170A (en) Picture signal processing device
GB1297628A (da)
RO87256B1 (ro) Circuit digital de control pentru un sistem telefonic
US4347406A (en) Pulse detector circuit
JPS55120243A (en) Supervisory unit for fault of transmission line
JPS5780871A (en) Video signal binary circuit in photoelectric conversion system
JPS57178543A (en) Digital comparator
GB1591869A (en) Alternating signal detector
TW234803B (en) Power relay control circuit for network communication device
ES467444A1 (es) Dispositivo para detectar la desviacion comun de un numero mde senales de cambio electricas de una pluralidad n de sena-les de cambio.
GB2020510A (en) Telephone answering machines
JPS5737922A (en) A/d converter and its output extending system
JPS56152353A (en) Receiving circuit of single current system
JPS57207902A (en) Input circuit of controlling device
GB1022699A (en) Improvements in or relating to electric gating circuits