FR2392567A1 - Dispositif pour deconnecter une source de bruit ou de signal d'un recepteur de numerotation au clavier envoyee sur une ligne telephonique - Google Patents

Dispositif pour deconnecter une source de bruit ou de signal d'un recepteur de numerotation au clavier envoyee sur une ligne telephonique

Info

Publication number
FR2392567A1
FR2392567A1 FR7815692A FR7815692A FR2392567A1 FR 2392567 A1 FR2392567 A1 FR 2392567A1 FR 7815692 A FR7815692 A FR 7815692A FR 7815692 A FR7815692 A FR 7815692A FR 2392567 A1 FR2392567 A1 FR 2392567A1
Authority
FR
France
Prior art keywords
signal
receiver
source
noise
keypad
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.)
Withdrawn
Application number
FR7815692A
Other languages
English (en)
French (fr)
Inventor
Wolf Ohl
Gunter Rahmig
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.)
International Standard Electric Corp
Original Assignee
International 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2392567A1 publication Critical patent/FR2392567A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
FR7815692A 1977-05-26 1978-05-26 Dispositif pour deconnecter une source de bruit ou de signal d'un recepteur de numerotation au clavier envoyee sur une ligne telephonique Withdrawn FR2392567A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772723795 DE2723795A1 (de) 1977-05-26 1977-05-26 Schaltungsanordnung zur abtrennung einer stoer- bzw. signalquelle von einem an einer fernsprechleitung betriebenen tastwahlempfaenger

Publications (1)

Publication Number Publication Date
FR2392567A1 true FR2392567A1 (fr) 1978-12-22

Family

ID=6009942

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7815692A Withdrawn FR2392567A1 (fr) 1977-05-26 1978-05-26 Dispositif pour deconnecter une source de bruit ou de signal d'un recepteur de numerotation au clavier envoyee sur une ligne telephonique

Country Status (5)

Country Link
BE (1) BE867511A (de)
BR (1) BR7803325A (de)
DE (1) DE2723795A1 (de)
FR (1) FR2392567A1 (de)
GB (1) GB1555002A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3171895D1 (en) * 1981-05-15 1985-09-26 Ibm Improvements in telecommunication receivers
CH678782A5 (de) * 1989-05-31 1991-10-31 Siemens Ag Albis

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270144A (en) * 1963-04-06 1966-08-30 Int Standard Electric Corp Dial signal receiving facilities
CH465677A (de) * 1963-04-06 1968-11-30 Standard Telephon & Radio Ag Schaltungsanordnung für die Wahlaufnahmeeinrichtungen einer Fernsprechvermittlungsanlage
DE2247744A1 (de) * 1971-10-07 1973-04-12 Philips Nv Fernsprechvermittlungsstelle mit tonwaehltastatur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270144A (en) * 1963-04-06 1966-08-30 Int Standard Electric Corp Dial signal receiving facilities
CH465677A (de) * 1963-04-06 1968-11-30 Standard Telephon & Radio Ag Schaltungsanordnung für die Wahlaufnahmeeinrichtungen einer Fernsprechvermittlungsanlage
DE2247744A1 (de) * 1971-10-07 1973-04-12 Philips Nv Fernsprechvermittlungsstelle mit tonwaehltastatur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/68 *

Also Published As

Publication number Publication date
BR7803325A (pt) 1979-02-20
DE2723795A1 (de) 1978-12-07
GB1555002A (en) 1979-11-07
BE867511A (fr) 1978-11-27

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Legal Events

Date Code Title Description
ST Notification of lapse