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GB1545254A - Circuit arrangement for a digital multifrequency-signal receiver - Google Patents

Circuit arrangement for a digital multifrequency-signal receiver

Info

Publication number
GB1545254A
GB1545254A GB48774/76A GB4877476A GB1545254A GB 1545254 A GB1545254 A GB 1545254A GB 48774/76 A GB48774/76 A GB 48774/76A GB 4877476 A GB4877476 A GB 4877476A GB 1545254 A GB1545254 A GB 1545254A
Authority
GB
United Kingdom
Prior art keywords
circuit arrangement
signal receiver
digital multifrequency
multifrequency
digital
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB48774/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1545254A publication Critical patent/GB1545254A/en
Expired legal-status Critical Current

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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Telephone Function (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Electronic Switches (AREA)
GB48774/76A 1975-11-27 1976-11-23 Circuit arrangement for a digital multifrequency-signal receiver Expired GB1545254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2553258A DE2553258C3 (en) 1975-11-27 1975-11-27 Circuit arrangement for a digital multi-frequency character receiver

Publications (1)

Publication Number Publication Date
GB1545254A true GB1545254A (en) 1979-05-02

Family

ID=5962770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48774/76A Expired GB1545254A (en) 1975-11-27 1976-11-23 Circuit arrangement for a digital multifrequency-signal receiver

Country Status (8)

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

Families Citing this family (1)

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

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
ES453636A1 (en) 1977-11-16
CH601955A5 (en) 1978-07-14
CA1078980A (en) 1980-06-03
BE848776R (en) 1977-05-26
DE2553258C3 (en) 1980-07-03
DE2553258B2 (en) 1979-10-25
FR2333398B1 (en) 1982-10-22
DE2553258A1 (en) 1977-06-02
FR2333398A1 (en) 1977-06-24
ZA766727B (en) 1977-10-26

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee