SE385179B - Kopplingsanordning for flerfrekvenssignalmottagare i teleanleggningar, serskilt telefonanleggningar som even utnyttjas for datatrafik - Google Patents

Kopplingsanordning for flerfrekvenssignalmottagare i teleanleggningar, serskilt telefonanleggningar som even utnyttjas for datatrafik

Info

Publication number
SE385179B
SE385179B SE7310414A SE7310414A SE385179B SE 385179 B SE385179 B SE 385179B SE 7310414 A SE7310414 A SE 7310414A SE 7310414 A SE7310414 A SE 7310414A SE 385179 B SE385179 B SE 385179B
Authority
SE
Sweden
Prior art keywords
telephone systems
connection device
data traffic
signal receivers
multifrequency signal
Prior art date
Application number
SE7310414A
Other languages
English (en)
Swedish (sv)
Inventor
K D Rother
Original Assignee
Siemens Ag
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 Ag filed Critical Siemens Ag
Publication of SE385179B publication Critical patent/SE385179B/xx

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
SE7310414A 1972-07-26 1973-07-26 Kopplingsanordning for flerfrekvenssignalmottagare i teleanleggningar, serskilt telefonanleggningar som even utnyttjas for datatrafik SE385179B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2236781A DE2236781C2 (de) 1972-07-26 1972-07-26 Schaltungsanordnung für Mehrfrequenzen-Codezeichenempfänger in Fernmelde-, insbesondere Fernsprechanlagen mit zusätzlichem Datenverkehr

Publications (1)

Publication Number Publication Date
SE385179B true SE385179B (sv) 1976-06-08

Family

ID=5851808

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7310414A SE385179B (sv) 1972-07-26 1973-07-26 Kopplingsanordning for flerfrekvenssignalmottagare i teleanleggningar, serskilt telefonanleggningar som even utnyttjas for datatrafik

Country Status (12)

Country Link
US (1) US3914558A (show.php)
JP (1) JPS4953702A (show.php)
AT (1) AT326732B (show.php)
BE (1) BE802836A (show.php)
CH (1) CH558115A (show.php)
DE (1) DE2236781C2 (show.php)
FR (1) FR2194092B1 (show.php)
GB (1) GB1427407A (show.php)
IT (1) IT992675B (show.php)
LU (1) LU68083A1 (show.php)
NL (1) NL7309814A (show.php)
SE (1) SE385179B (show.php)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534636A1 (de) * 1975-08-02 1977-02-17 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zum senden von anschaltinformationen, insbesondere in nebenstellenanlagen
JPS54120503A (en) * 1978-03-11 1979-09-19 Nippon Telegr & Teleph Corp <Ntt> Coding system for push-button dial signal
FR2759224B1 (fr) * 1997-02-06 1999-04-30 Info Telecom Procedes de transmission et de decodage acoustiques d'un message numerique et dispositifs correspondants

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288940A (en) * 1963-10-24 1966-11-29 Automatic Elect Lab Multifrequency signal receiver
US3582562A (en) * 1969-05-07 1971-06-01 Itt Key telephone intercommunication system

Also Published As

Publication number Publication date
AT326732B (de) 1975-12-29
NL7309814A (show.php) 1974-01-29
FR2194092B1 (show.php) 1976-11-12
GB1427407A (en) 1976-03-10
DE2236781C2 (de) 1974-06-12
IT992675B (it) 1975-09-30
US3914558A (en) 1975-10-21
DE2236781A1 (show.php) 1973-11-08
JPS4953702A (show.php) 1974-05-24
LU68083A1 (show.php) 1974-03-07
BE802836A (fr) 1974-01-28
ATA438073A (de) 1975-03-15
DE2236781B1 (de) 1973-11-08
FR2194092A1 (show.php) 1974-02-22
CH558115A (de) 1975-01-15

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