BR8104310A - MULTIPLE FREQUENCY SIGNALING CONTROL UNIT - Google Patents

MULTIPLE FREQUENCY SIGNALING CONTROL UNIT

Info

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
Application number
BR8104310A
Other languages
Portuguese (pt)
Inventor
M Springolo
V Banfi
Original Assignee
Italtel Spa
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 Italtel Spa filed Critical Italtel Spa
Publication of BR8104310A publication Critical patent/BR8104310A/en

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
    • H04Q1/457—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)
BR8104310A 1980-07-09 1981-07-07 MULTIPLE FREQUENCY SIGNALING CONTROL UNIT BR8104310A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT23332/80A IT1148885B (en) 1980-07-09 1980-07-09 MULTIFREQUENCY TYPE SIGNALING CONTROL UNIT, OF PARTICULAR APPLICATION IN TELEPHONE UNITS FOR NUMERIC TYPES OF TRANSIT

Publications (1)

Publication Number Publication Date
BR8104310A true BR8104310A (en) 1982-03-23

Family

ID=11206151

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8104310A BR8104310A (en) 1980-07-09 1981-07-07 MULTIPLE FREQUENCY SIGNALING CONTROL UNIT

Country Status (5)

Country Link
BR (1) BR8104310A (en)
DE (1) DE3126981A1 (en)
FR (1) FR2486748A1 (en)
GB (1) GB2080074A (en)
IT (1) IT1148885B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH672968A5 (en) * 1984-11-30 1990-01-15 Autophon Ascom Ag

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT284917B (en) * 1968-07-22 1970-10-12 Siemens Ag Circuit arrangement for the reception of different characters transmitted in uninterrupted sequence in telecommunications, in particular telephone systems
DE2045144A1 (en) * 1970-09-11 1972-03-16 Siemens Ag Frequency selective signal receiver
DE2157559C3 (en) * 1971-11-19 1978-05-03 Standard Elektrik Lorenz Ag, 7000 Stuttgart Multi-frequency code signal receivers for telecommunications, in particular telephone systems
FR2296221A1 (en) * 1974-12-27 1976-07-23 Ibm France SIGNAL PROCESSING SYSTEM
IT1072242B (en) * 1976-12-17 1985-04-10 Cselt Centro Studi Lab Telecom PROCEDURE AND DEVICE FOR THE RECOGNITION OF TELEPHONE SIGNALS IN MULTIFREQUENCY CODE CONVERTED IN NUMERICAL FORM
US4133979A (en) * 1977-01-26 1979-01-09 Trw, Inc. Multifrequency sender/receiver in a multi-time slot digital data stream

Also Published As

Publication number Publication date
FR2486748A1 (en) 1982-01-15
IT8023332A0 (en) 1980-07-09
IT1148885B (en) 1986-12-03
DE3126981A1 (en) 1982-03-11
GB2080074A (en) 1982-01-27

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