BR8104310A - Unidade de controle de sinalizacao de multiplas frequencias - Google Patents
Unidade de controle de sinalizacao de multiplas frequenciasInfo
- Publication number
- BR8104310A BR8104310A BR8104310A BR8104310A BR8104310A BR 8104310 A BR8104310 A BR 8104310A BR 8104310 A BR8104310 A BR 8104310A BR 8104310 A BR8104310 A BR 8104310A BR 8104310 A BR8104310 A BR 8104310A
- Authority
- BR
- Brazil
- Prior art keywords
- control unit
- multiple frequency
- signaling control
- frequency signaling
- unit
- Prior art date
Links
- 230000011664 signaling Effects 0.000 title 1
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
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
-
- 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)
- Exchange Systems With Centralized Control (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT23332/80A IT1148885B (it) | 1980-07-09 | 1980-07-09 | Unita' di controllo della segnalazione di tipo multifrequenza,di particolare applicazione nelle centrali telefonichedi transito di tipo numerico |
Publications (1)
Publication Number | Publication Date |
---|---|
BR8104310A true BR8104310A (pt) | 1982-03-23 |
Family
ID=11206151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR8104310A BR8104310A (pt) | 1980-07-09 | 1981-07-07 | Unidade de controle de sinalizacao de multiplas frequencias |
Country Status (5)
Country | Link |
---|---|
BR (1) | BR8104310A (fr) |
DE (1) | DE3126981A1 (fr) |
FR (1) | FR2486748A1 (fr) |
GB (1) | GB2080074A (fr) |
IT (1) | IT1148885B (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH672968A5 (fr) * | 1984-11-30 | 1990-01-15 | Autophon Ascom Ag |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT284917B (de) * | 1968-07-22 | 1970-10-12 | Siemens Ag | Schaltungsanordnung für den Empfang von in ununterbrochener Folge übertragenen unterschiedlichen Zeichen in Fernmelde-, insbesondere Fernsprechanlagen |
DE2045144A1 (de) * | 1970-09-11 | 1972-03-16 | Siemens Ag | Frequenzselektiver Signalempfänger |
DE2157559C3 (de) * | 1971-11-19 | 1978-05-03 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Mehrfrequenzcodesignalempfanger für Fernmelde-, insbesondere Fernsprechanlagen |
FR2296221A1 (fr) * | 1974-12-27 | 1976-07-23 | Ibm France | Systeme de traitement du signal |
IT1072242B (it) * | 1976-12-17 | 1985-04-10 | Cselt Centro Studi Lab Telecom | Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica |
US4133979A (en) * | 1977-01-26 | 1979-01-09 | Trw, Inc. | Multifrequency sender/receiver in a multi-time slot digital data stream |
-
1980
- 1980-07-09 IT IT23332/80A patent/IT1148885B/it active
-
1981
- 1981-06-25 FR FR8112465A patent/FR2486748A1/fr not_active Withdrawn
- 1981-07-07 BR BR8104310A patent/BR8104310A/pt unknown
- 1981-07-08 DE DE3126981A patent/DE3126981A1/de not_active Withdrawn
- 1981-07-09 GB GB8121262A patent/GB2080074A/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
GB2080074A (en) | 1982-01-27 |
IT8023332A0 (it) | 1980-07-09 |
IT1148885B (it) | 1986-12-03 |
FR2486748A1 (fr) | 1982-01-15 |
DE3126981A1 (de) | 1982-03-11 |
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