GB2044039B - Digital signalling receiver for receiving pcm tones - Google Patents

Digital signalling receiver for receiving pcm tones

Info

Publication number
GB2044039B
GB2044039B GB8004800A GB8004800A GB2044039B GB 2044039 B GB2044039 B GB 2044039B GB 8004800 A GB8004800 A GB 8004800A GB 8004800 A GB8004800 A GB 8004800A GB 2044039 B GB2044039 B GB 2044039B
Authority
GB
United Kingdom
Prior art keywords
digital signalling
signalling receiver
receiving pcm
tones
pcm tones
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
GB8004800A
Other languages
English (en)
Other versions
GB2044039A (en
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 GB2044039A publication Critical patent/GB2044039A/en
Application granted granted Critical
Publication of GB2044039B publication Critical patent/GB2044039B/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Mobile Radio Communication Systems (AREA)
GB8004800A 1979-02-22 1980-02-13 Digital signalling receiver for receiving pcm tones Expired GB2044039B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA322,112A CA1111531A (en) 1979-02-22 1979-02-22 Digital signalling receiver for receiving pcm tones

Publications (2)

Publication Number Publication Date
GB2044039A GB2044039A (en) 1980-10-08
GB2044039B true GB2044039B (en) 1983-05-11

Family

ID=4113607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8004800A Expired GB2044039B (en) 1979-02-22 1980-02-13 Digital signalling receiver for receiving pcm tones

Country Status (9)

Country Link
JP (1) JPS55137788A (enrdf_load_stackoverflow)
AT (1) AT386312B (enrdf_load_stackoverflow)
CA (1) CA1111531A (enrdf_load_stackoverflow)
DE (1) DE3005740A1 (enrdf_load_stackoverflow)
FR (1) FR2450017A1 (enrdf_load_stackoverflow)
GB (1) GB2044039B (enrdf_load_stackoverflow)
IT (1) IT1140634B (enrdf_load_stackoverflow)
NL (1) NL8001026A (enrdf_load_stackoverflow)
SE (1) SE452388B (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5779751A (en) * 1980-11-05 1982-05-19 Nec Corp Signal receiver
FR2504754A1 (fr) * 1981-04-27 1982-10-29 Thomson Csf Mat Tel Dispositif sequenceur a memoires mortes
US4519072A (en) * 1982-11-10 1985-05-21 Rockwell International Corporation Answer supervision system
JPH07171782A (ja) * 1991-07-16 1995-07-11 Haruo Konagai 真空吸着装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1603175A (enrdf_load_stackoverflow) * 1968-07-30 1971-03-22
US3863030A (en) * 1972-06-01 1975-01-28 Gte Automatic Electric Lab Inc Pcm tone receiver using digital spectrum analysis
JPS51112218A (en) * 1975-03-28 1976-10-04 Hitachi Ltd Multifrequency signal receiver
JPS5918916B2 (ja) * 1975-10-06 1984-05-01 株式会社日立製作所 多周波信号受信器
IT1072242B (it) * 1976-12-17 1985-04-10 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica

Also Published As

Publication number Publication date
JPS55137788A (en) 1980-10-27
FR2450017B1 (enrdf_load_stackoverflow) 1984-05-11
AT386312B (de) 1988-08-10
ATA96280A (de) 1987-12-15
GB2044039A (en) 1980-10-08
IT1140634B (it) 1986-10-01
IT8019986A0 (it) 1980-02-18
IT8019986A1 (it) 1981-08-18
SE452388B (sv) 1987-11-23
FR2450017A1 (fr) 1980-09-19
CA1111531A (en) 1981-10-27
DE3005740A1 (de) 1980-09-04
SE8001315L (sv) 1980-08-23
NL8001026A (nl) 1980-08-26

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Legal Events

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