BE883638A - 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
BE883638A
BE883638A BE0/200889A BE200889A BE883638A BE 883638 A BE883638 A BE 883638A BE 0/200889 A BE0/200889 A BE 0/200889A BE 200889 A BE200889 A BE 200889A BE 883638 A BE883638 A BE 883638A
Authority
BE
Belgium
Prior art keywords
detection device
current detection
automatic telephone
telephone central
central
Prior art date
Application number
BE0/200889A
Other languages
English (en)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of BE883638A publication Critical patent/BE883638A/fr

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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
BE0/200889A 1979-06-06 1980-06-04 Dispositif de detection de courant pour un central telephonique automatique BE883638A (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 (1)

Publication Number Publication Date
BE883638A true BE883638A (fr) 1980-12-04

Family

ID=19833306

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/200889A BE883638A (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
US5892823A (en) 1996-03-27 1999-04-06 Hello Direct, Inc. Smart interface technology
US5912964A (en) * 1996-03-27 1999-06-15 Hello Direct, Inc. Adaptive telephone handset interface
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
NL294136A (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
GB2052215A (en) 1981-01-21
IT8022533A0 (it) 1980-06-03
NL7904429A (nl) 1980-12-09
JPS55165092A (en) 1980-12-23
JPS6239877B2 (fr) 1987-08-25
GB2052215B (en) 1983-05-25
AU5900680A (en) 1980-12-11
DE3020353C2 (de) 1983-12-08
FR2458963B1 (fr) 1987-07-31
US4319092A (en) 1982-03-09
AU537316B2 (en) 1984-06-14
CA1143491A (fr) 1983-03-22
IT1131255B (it) 1986-06-18
SE447691B (sv) 1986-12-01
SE8004114L (sv) 1980-12-07
FR2458963A1 (fr) 1981-01-02
DE3020353A1 (de) 1980-12-18

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: N.V. PHILIPS' GLOEILAMPENFABRIEKEN

Effective date: 19920630