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BR7705963A - Disposicao de circuito adaptada para permitir a selecao por teclado com sinal-chave e efetuada por usuarios - Google Patents

Disposicao de circuito adaptada para permitir a selecao por teclado com sinal-chave e efetuada por usuarios

Info

Publication number
BR7705963A
BR7705963A BR7705963A BR7705963A BR7705963A BR 7705963 A BR7705963 A BR 7705963A BR 7705963 A BR7705963 A BR 7705963A BR 7705963 A BR7705963 A BR 7705963A BR 7705963 A BR7705963 A BR 7705963A
Authority
BR
Brazil
Prior art keywords
keyboard
users
circuit arrangement
allow selection
key sign
Prior art date
Application number
BR7705963A
Other languages
English (en)
Inventor
C Panzeri
F Marco
Original Assignee
Siemens Spa Italiana
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 Siemens Spa Italiana filed Critical Siemens Spa Italiana
Publication of BR7705963A publication Critical patent/BR7705963A/pt

Links

Classifications

    • 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • H04Q1/4535—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted with an additional signal transmitted for voice protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Input From Keyboards Or The Like (AREA)
BR7705963A 1976-11-24 1977-09-08 Disposicao de circuito adaptada para permitir a selecao por teclado com sinal-chave e efetuada por usuarios BR7705963A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT29654/76A IT1074085B (it) 1976-11-24 1976-11-24 Disposizione circuitale atta a consentire la selezione a tastiera con segnale chiave da parte di utenti telefonici lontani

Publications (1)

Publication Number Publication Date
BR7705963A true BR7705963A (pt) 1978-07-04

Family

ID=11228184

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7705963A BR7705963A (pt) 1976-11-24 1977-09-08 Disposicao de circuito adaptada para permitir a selecao por teclado com sinal-chave e efetuada por usuarios

Country Status (5)

Country Link
US (1) US4130736A (pt)
BR (1) BR7705963A (pt)
DE (1) DE2752554A1 (pt)
FR (1) FR2372564B1 (pt)
IT (1) IT1074085B (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8530916D0 (en) * 1985-12-16 1986-01-29 British Telecomm Connecting modems to switched network
US4996709A (en) * 1988-05-12 1991-02-26 Tandy Corporation Intercom telephone
US5680397A (en) * 1995-03-13 1997-10-21 International Business Machines Corporation Multi-port LAN switch for a token-ring network
RU2506723C1 (ru) * 2013-02-05 2014-02-10 Федеральное государственное казенное учреждение "27 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации Комплексная аппаратная связи и радиодоступа
RU2612277C2 (ru) * 2015-07-21 2017-03-06 Акционерное общество "Ижевский радиозавод" Радиостанция

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR995166A (pt) * 1948-09-09
DE1178475B (de) * 1963-04-26 1964-09-24 Siemens Ag Schaltungsanordnung fuer eine Fernsprech-, insbesondere Fernsprechnebenstellenanlage mit Codewahl und Impulswahl der Sprechstellen

Also Published As

Publication number Publication date
FR2372564B1 (pt) 1982-02-19
DE2752554A1 (de) 1978-06-01
IT1074085B (it) 1985-04-17
FR2372564A1 (pt) 1978-06-23
US4130736A (en) 1978-12-19

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