FR2458963B1 - Dispositif de detection de courant pour un central telephonique automatique - Google Patents

Dispositif de detection de courant pour un central telephonique automatique

Info

Publication number
FR2458963B1
FR2458963B1 FR8012434A FR8012434A FR2458963B1 FR 2458963 B1 FR2458963 B1 FR 2458963B1 FR 8012434 A FR8012434 A FR 8012434A FR 8012434 A FR8012434 A FR 8012434A FR 2458963 B1 FR2458963 B1 FR 2458963B1
Authority
FR
France
Prior art keywords
detection device
current detection
telephone exchange
automatic telephone
automatic
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
FR8012434A
Other languages
English (en)
Other versions
FR2458963A1 (fr
Inventor
Adrianus Wilhelmus Maria Enden
Job Franciscus Petrus Van Mil
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2458963A1 publication Critical patent/FR2458963A1/fr
Application granted granted Critical
Publication of FR2458963B1 publication Critical patent/FR2458963B1/fr
Expired legal-status Critical Current

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
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR8012434A 1979-06-06 1980-06-04 Dispositif de detection de courant pour un central telephonique automatique Expired FR2458963B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7904429A NL7904429A (nl) 1979-06-06 1979-06-06 Stroomdetectie-inrichting voor een automatische telefooncentrale.

Publications (2)

Publication Number Publication Date
FR2458963A1 FR2458963A1 (fr) 1981-01-02
FR2458963B1 true FR2458963B1 (fr) 1987-07-31

Family

ID=19833306

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8012434A Expired FR2458963B1 (fr) 1979-06-06 1980-06-04 Dispositif de detection de courant pour un central telephonique automatique

Country Status (11)

Country Link
US (1) US4319092A (fr)
JP (1) JPS55165092A (fr)
AU (1) AU537316B2 (fr)
BE (1) BE883638A (fr)
CA (1) CA1143491A (fr)
DE (1) DE3020353C2 (fr)
FR (1) FR2458963B1 (fr)
GB (1) GB2052215B (fr)
IT (1) IT1131255B (fr)
NL (1) NL7904429A (fr)
SE (2) SE447691B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3709538A1 (de) * 1987-03-24 1988-10-06 Siemens Ag Schaltungsanordnung fuer eine fernsprechstation mit erdeanschaltung
JPH0382800U (fr) * 1989-12-13 1991-08-22
US5473676A (en) * 1990-09-27 1995-12-05 Radish Communications Systems, Inc. Telephone handset interface for automatic switching between voice and data communications
US5287404A (en) * 1990-12-20 1994-02-15 Northern Telecom Limited Telephone subscriber line voltage change detection
US6343126B1 (en) 1996-03-27 2002-01-29 Hello Direct, Inc. Method and apparatus for interfacing analog telephone apparatus to a digital, analog or hybrid telephone switching system
US5912964A (en) * 1996-03-27 1999-06-15 Hello Direct, Inc. Adaptive telephone handset interface
US5892823A (en) * 1996-03-27 1999-04-06 Hello Direct, Inc. Smart interface technology
US7031454B1 (en) 1997-11-06 2006-04-18 Hello Direct, Inc. Method and apparatus for interfacing telephone apparatus to a digital, analog or hybrid telephone switching system
USD779141S1 (en) * 2014-11-04 2017-02-14 The Fifty/Fifty Group, Inc. Cleaning cloth

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL289634A (fr) * 1962-03-01
FR2147408A5 (fr) * 1971-07-27 1973-03-09 Constr Telephoniques
SE7402969L (fr) * 1974-03-06 1975-09-08 Ericsson Telefon Ab L M
DE2547880C2 (de) * 1975-10-25 1981-09-24 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zur Erkennung von Betriebszuständen einer Teilnehmerleitung und zur Rufanschaltung sowie Rufabschaltung in Fernsprechvermittlungsanlagen
US4099032A (en) * 1977-03-25 1978-07-04 Wescom, Inc. Loop current detector
CH618306A5 (en) * 1977-08-24 1980-07-15 Siemens Ag Albis Arrangement for identifying a DC switching signal in a telecommunications system

Also Published As

Publication number Publication date
SE447691B (sv) 1986-12-01
CA1143491A (fr) 1983-03-22
GB2052215B (en) 1983-05-25
IT8022533A0 (it) 1980-06-03
BE883638A (fr) 1980-12-04
JPS55165092A (en) 1980-12-23
AU5900680A (en) 1980-12-11
FR2458963A1 (fr) 1981-01-02
AU537316B2 (en) 1984-06-14
IT1131255B (it) 1986-06-18
NL7904429A (nl) 1980-12-09
GB2052215A (en) 1981-01-21
SE8004114L (sv) 1980-12-07
US4319092A (en) 1982-03-09
DE3020353A1 (de) 1980-12-18
JPS6239877B2 (fr) 1987-08-25
DE3020353C2 (de) 1983-12-08

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Legal Events

Date Code Title Description
ST Notification of lapse