IT1074085B - Disposizione circuitale atta a consentire la selezione a tastiera con segnale chiave da parte di utenti telefonici lontani - Google Patents
Disposizione circuitale atta a consentire la selezione a tastiera con segnale chiave da parte di utenti telefonici lontaniInfo
- Publication number
- IT1074085B IT1074085B IT29654/76A IT2965476A IT1074085B IT 1074085 B IT1074085 B IT 1074085B IT 29654/76 A IT29654/76 A IT 29654/76A IT 2965476 A IT2965476 A IT 2965476A IT 1074085 B IT1074085 B IT 1074085B
- Authority
- IT
- Italy
- Prior art keywords
- key signal
- remote telephone
- telephone users
- keyboard selection
- circuit provision
- Prior art date
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
Priority Applications (5)
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 |
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 |
FR7733700A FR2372564B1 (it) | 1976-11-24 | 1977-11-09 | |
US05/853,853 US4130736A (en) | 1976-11-24 | 1977-11-22 | Telecommunication system with keyboard selection |
DE19772752554 DE2752554A1 (de) | 1976-11-24 | 1977-11-24 | Schaltungsanordnung zur steuerung der vermittlungsvorgaenge in einem fernmeldesystem |
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 |
---|---|
IT1074085B true IT1074085B (it) | 1985-04-17 |
Family
ID=11228184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
Country Status (5)
Country | Link |
---|---|
US (1) | US4130736A (it) |
BR (1) | BR7705963A (it) |
DE (1) | DE2752554A1 (it) |
FR (1) | FR2372564B1 (it) |
IT (1) | IT1074085B (it) |
Families Citing this family (5)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB651604A (it) * | 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 |
-
1976
- 1976-11-24 IT IT29654/76A patent/IT1074085B/it active
-
1977
- 1977-09-08 BR BR7705963A patent/BR7705963A/pt unknown
- 1977-11-09 FR FR7733700A patent/FR2372564B1/fr not_active Expired
- 1977-11-22 US US05/853,853 patent/US4130736A/en not_active Expired - Lifetime
- 1977-11-24 DE DE19772752554 patent/DE2752554A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR2372564B1 (it) | 1982-02-19 |
US4130736A (en) | 1978-12-19 |
DE2752554A1 (de) | 1978-06-01 |
FR2372564A1 (it) | 1978-06-23 |
BR7705963A (pt) | 1978-07-04 |
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