GB1553019A - Receiver/sender - Google Patents

Receiver/sender

Info

Publication number
GB1553019A
GB1553019A GB2591677A GB2591677A GB1553019A GB 1553019 A GB1553019 A GB 1553019A GB 2591677 A GB2591677 A GB 2591677A GB 2591677 A GB2591677 A GB 2591677A GB 1553019 A GB1553019 A GB 1553019A
Authority
GB
United Kingdom
Prior art keywords
sender
receiver
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
GB2591677A
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of GB1553019A publication Critical patent/GB1553019A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H04M1/505—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
GB2591677A 1976-08-19 1977-06-21 Receiver/sender Expired GB1553019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA259,463A CA1053821A (en) 1976-08-19 1976-08-19 Receiver/sender for signalling between telephone switching facilities

Publications (1)

Publication Number Publication Date
GB1553019A true GB1553019A (en) 1979-09-19

Family

ID=4106691

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2591677A Expired GB1553019A (en) 1976-08-19 1977-06-21 Receiver/sender

Country Status (9)

Country Link
JP (1) JPS5324706A (en)
BE (1) BE857802A (en)
CA (1) CA1053821A (en)
DE (1) DE2735478A1 (en)
ES (1) ES461745A1 (en)
FR (1) FR2362545A1 (en)
GB (1) GB1553019A (en)
NL (1) NL7707137A (en)
SE (1) SE7709370L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0219296A (en) * 1988-07-05 1990-01-23 Tokyo Kyoei Shokai:Kk Hopper gate opening and closing apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603773A (en) * 1969-08-28 1971-09-07 Vernitron Corp Digital pulse rate generator
US3716794A (en) * 1972-04-26 1973-02-13 E Teggatz Frequency dividing apparatus
FR2280141A1 (en) * 1974-07-26 1976-02-20 Materiel Telephonique System of signalling between data processing centres - has seven frequency divider sub-assemblies, decoders and filters

Also Published As

Publication number Publication date
SE7709370L (en) 1978-02-20
BE857802A (en) 1978-02-16
JPS5324706A (en) 1978-03-07
FR2362545A1 (en) 1978-03-17
CA1053821A (en) 1979-05-01
ES461745A1 (en) 1978-05-01
DE2735478A1 (en) 1978-02-23
NL7707137A (en) 1978-02-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee