BE848776R - Recepteur selectif de signaux pour des systemes de communication, plusparticulierement des systemes de telephonie - Google Patents

Recepteur selectif de signaux pour des systemes de communication, plusparticulierement des systemes de telephonie

Info

Publication number
BE848776R
BE848776R BE2055485A BE2055485A BE848776R BE 848776 R BE848776 R BE 848776R BE 2055485 A BE2055485 A BE 2055485A BE 2055485 A BE2055485 A BE 2055485A BE 848776 R BE848776 R BE 848776R
Authority
BE
Belgium
Prior art keywords
systems
signal receiver
selective signal
communication systems
especially telephony
Prior art date
Application number
BE2055485A
Other languages
English (en)
French (fr)
Inventor
W Ohl
H Ball
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 filed Critical
Application granted granted Critical
Publication of BE848776R publication Critical patent/BE848776R/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Telephone Function (AREA)
  • Electronic Switches (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
BE2055485A 1975-11-27 1976-11-26 Recepteur selectif de signaux pour des systemes de communication, plusparticulierement des systemes de telephonie BE848776R (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2553258A DE2553258C3 (de) 1975-11-27 1975-11-27 Schaltungsanordnung für einen digitalen Mehrfrequenz-Zeichenempfänger

Publications (1)

Publication Number Publication Date
BE848776R true BE848776R (fr) 1977-05-26

Family

ID=5962770

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2055485A BE848776R (fr) 1975-11-27 1976-11-26 Recepteur selectif de signaux pour des systemes de communication, plusparticulierement des systemes de telephonie

Country Status (8)

Country Link
BE (1) BE848776R (enExample)
CA (1) CA1078980A (enExample)
CH (1) CH601955A5 (enExample)
DE (1) DE2553258C3 (enExample)
ES (1) ES453636A1 (enExample)
FR (1) FR2333398A1 (enExample)
GB (1) GB1545254A (enExample)
ZA (1) ZA766727B (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7903346A (nl) * 1979-04-27 1980-10-29 Bell Telephone Mfg Digitaal signaleringsstelsel.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912869A (en) * 1973-11-21 1975-10-14 Tel Tone Corp Multifrequency-to-digital converter

Also Published As

Publication number Publication date
GB1545254A (en) 1979-05-02
ZA766727B (en) 1977-10-26
DE2553258C3 (de) 1980-07-03
ES453636A1 (es) 1977-11-16
FR2333398B1 (enExample) 1982-10-22
DE2553258B2 (de) 1979-10-25
CA1078980A (en) 1980-06-03
CH601955A5 (enExample) 1978-07-14
DE2553258A1 (de) 1977-06-02
FR2333398A1 (fr) 1977-06-24

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