NL7312548A - Multifrequent signaleringsstelsel. - Google Patents

Multifrequent signaleringsstelsel.

Info

Publication number
NL7312548A
NL7312548A NL7312548A NL7312548A NL7312548A NL 7312548 A NL7312548 A NL 7312548A NL 7312548 A NL7312548 A NL 7312548A NL 7312548 A NL7312548 A NL 7312548A NL 7312548 A NL7312548 A NL 7312548A
Authority
NL
Netherlands
Prior art keywords
multifrequent
signaling system
signaling
multifrequent signaling
Prior art date
Application number
NL7312548A
Other languages
English (en)
Original Assignee
Bell Telephone Mfg
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 Bell Telephone Mfg filed Critical Bell Telephone Mfg
Priority to NL7312548A priority Critical patent/NL7312548A/nl
Priority to GB3069774A priority patent/GB1474403A/en
Priority to ZA00744657A priority patent/ZA744657B/xx
Priority to IE1569/74A priority patent/IE40288B1/en
Priority to AU71771/74A priority patent/AU484077B2/en
Priority to NO743189A priority patent/NO140727C/no
Priority to DE2442674A priority patent/DE2442674A1/de
Priority to BR7544/74A priority patent/BR7407544A/pt
Priority to FR7430733A priority patent/FR2243572B1/fr
Priority to IT27163/74A priority patent/IT1021273B/it
Priority to US05/505,014 priority patent/US3961143A/en
Priority to ES429974A priority patent/ES429974A1/es
Priority to BE2053860A priority patent/BE819816A/nl
Publication of NL7312548A publication Critical patent/NL7312548A/nl

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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
NL7312548A 1973-09-12 1973-09-12 Multifrequent signaleringsstelsel. NL7312548A (nl)

Priority Applications (13)

Application Number Priority Date Filing Date Title
NL7312548A NL7312548A (nl) 1973-09-12 1973-09-12 Multifrequent signaleringsstelsel.
GB3069774A GB1474403A (en) 1973-09-12 1974-07-11 Multiple-frequency signal receiver
ZA00744657A ZA744657B (en) 1973-09-12 1974-07-22 Multiple-frequency signalling system
IE1569/74A IE40288B1 (en) 1973-09-12 1974-07-23 Multi-frequency signal receiver
AU71771/74A AU484077B2 (en) 1974-07-29 Multiple-frequency signalling system
NO743189A NO140727C (no) 1973-09-12 1974-09-05 Multifrekvent signaleringssystem
DE2442674A DE2442674A1 (de) 1973-09-12 1974-09-06 Mehrfrequenzempfaenger
BR7544/74A BR7407544A (pt) 1973-09-12 1974-09-11 Metodo de sinalizacao de frequencia multipla
FR7430733A FR2243572B1 (nl) 1973-09-12 1974-09-11
IT27163/74A IT1021273B (it) 1973-09-12 1974-09-11 Sistema di segnalazione a fre quenza multipla
US05/505,014 US3961143A (en) 1973-09-12 1974-09-11 Multi-frequency signalling system
ES429974A ES429974A1 (es) 1973-09-12 1974-09-11 Un sistema de senalizacion por frecuencias multiples.
BE2053860A BE819816A (nl) 1973-09-12 1974-09-12 Multifrequent signaleringsstelsel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7312548A NL7312548A (nl) 1973-09-12 1973-09-12 Multifrequent signaleringsstelsel.

Publications (1)

Publication Number Publication Date
NL7312548A true NL7312548A (nl) 1975-03-14

Family

ID=19819583

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7312548A NL7312548A (nl) 1973-09-12 1973-09-12 Multifrequent signaleringsstelsel.

Country Status (12)

Country Link
US (1) US3961143A (nl)
BE (1) BE819816A (nl)
BR (1) BR7407544A (nl)
DE (1) DE2442674A1 (nl)
ES (1) ES429974A1 (nl)
FR (1) FR2243572B1 (nl)
GB (1) GB1474403A (nl)
IE (1) IE40288B1 (nl)
IT (1) IT1021273B (nl)
NL (1) NL7312548A (nl)
NO (1) NO140727C (nl)
ZA (1) ZA744657B (nl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391612A (en) * 1977-01-24 1978-08-11 Nec Corp Receiver for multiple frequency signal
US4091243A (en) * 1977-07-26 1978-05-23 Bell Telephone Laboratories, Incorporated Multifrequency signal receiver
NL7903346A (nl) * 1979-04-27 1980-10-29 Bell Telephone Mfg Digitaal signaleringsstelsel.
US5170487A (en) * 1989-01-19 1992-12-08 Seiko Corp. Paging system with multiple frequencies and multiple protocols
US7835701B2 (en) * 2004-03-29 2010-11-16 Edgewater Computer Systems, Inc. Detecting and eliminating spurious energy in communications systems via multi-channel processing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072747A (en) * 1958-05-27 1963-01-08 Ass Elect Ind Woolwich Ltd Pulse signalling systems
NL267564A (nl) * 1960-08-22
US3539731A (en) * 1968-11-05 1970-11-10 Bell Telephone Labor Inc Multifrequency signal receiver

Also Published As

Publication number Publication date
ES429974A1 (es) 1976-10-01
NO140727B (no) 1979-07-16
FR2243572B1 (nl) 1978-02-17
GB1474403A (en) 1977-05-25
NO743189L (nl) 1975-04-07
AU7177174A (en) 1976-01-29
ZA744657B (en) 1975-08-27
IT1021273B (it) 1978-01-30
FR2243572A1 (nl) 1975-04-04
BR7407544A (pt) 1976-05-04
US3961143A (en) 1976-06-01
NO140727C (no) 1979-10-24
BE819816A (nl) 1975-03-12
IE40288B1 (en) 1979-04-25
DE2442674A1 (de) 1975-03-13
IE40288L (en) 1975-03-12

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BI The patent application has been withdrawn