BR7803325A - Arranjo de circuito para desconectar uma fonte de ruido ou de sinal de um receptor de sinais com teclagem operado numa linha telefonica - Google Patents

Arranjo de circuito para desconectar uma fonte de ruido ou de sinal de um receptor de sinais com teclagem operado numa linha telefonica

Info

Publication number
BR7803325A
BR7803325A BR7803325A BR7803325A BR7803325A BR 7803325 A BR7803325 A BR 7803325A BR 7803325 A BR7803325 A BR 7803325A BR 7803325 A BR7803325 A BR 7803325A BR 7803325 A BR7803325 A BR 7803325A
Authority
BR
Brazil
Prior art keywords
signal
keypage
disconnect
noise
operated
Prior art date
Application number
BR7803325A
Other languages
English (en)
Portuguese (pt)
Inventor
W Ohl
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 BR7803325A publication Critical patent/BR7803325A/pt

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)
BR7803325A 1977-05-26 1978-05-24 Arranjo de circuito para desconectar uma fonte de ruido ou de sinal de um receptor de sinais com teclagem operado numa linha telefonica BR7803325A (pt)

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
BR7803325A true BR7803325A (pt) 1979-02-20

Family

ID=6009942

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7803325A BR7803325A (pt) 1977-05-26 1978-05-24 Arranjo de circuito para desconectar uma fonte de ruido ou de sinal de um receptor de sinais com teclagem operado numa linha telefonica

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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH465677A (de) * 1963-04-06 1968-11-30 Standard Telephon & Radio Ag Schaltungsanordnung für die Wahlaufnahmeeinrichtungen einer Fernsprechvermittlungsanlage
FR1339209A (fr) * 1963-04-06 1963-10-04 Int Standard Electric Corp Récepteur à fréquences vocales
NL7113750A (de) * 1971-10-07 1973-04-10

Also Published As

Publication number Publication date
GB1555002A (en) 1979-11-07
FR2392567A1 (fr) 1978-12-22
BE867511A (fr) 1978-11-27
DE2723795A1 (de) 1978-12-07

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