BE852497A - TONE VERIFICATION DEVICE IN A MIC SWITCHING CENTER - Google Patents

TONE VERIFICATION DEVICE IN A MIC SWITCHING CENTER

Info

Publication number
BE852497A
BE852497A BE2055739A BE2055739A BE852497A BE 852497 A BE852497 A BE 852497A BE 2055739 A BE2055739 A BE 2055739A BE 2055739 A BE2055739 A BE 2055739A BE 852497 A BE852497 A BE 852497A
Authority
BE
Belgium
Prior art keywords
switching center
verification device
tone verification
mic switching
mic
Prior art date
Application number
BE2055739A
Other languages
French (fr)
Inventor
A Lejay
Original Assignee
Int 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of BE852497A publication Critical patent/BE852497A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE2055739A 1976-03-16 1977-03-16 TONE VERIFICATION DEVICE IN A MIC SWITCHING CENTER BE852497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7607447A FR2345023A1 (en) 1976-03-16 1976-03-16 TONE VERIFICATION DEVICE IN A MIC SWITCHING CENTER

Publications (1)

Publication Number Publication Date
BE852497A true BE852497A (en) 1977-09-16

Family

ID=9170457

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2055739A BE852497A (en) 1976-03-16 1977-03-16 TONE VERIFICATION DEVICE IN A MIC SWITCHING CENTER

Country Status (6)

Country Link
BE (1) BE852497A (en)
CH (1) CH620560A5 (en)
DE (1) DE2710954C2 (en)
ES (1) ES456900A1 (en)
FR (1) FR2345023A1 (en)
GB (1) GB1520233A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2474785A1 (en) * 1980-01-09 1981-07-31 Cit Alcatel DEVICE FOR CONTROLLING A DIGITAL SIGNAL GENERATOR
DE3116576A1 (en) * 1981-04-27 1982-11-18 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Method for operating a digital audible tone generator
DE3229438A1 (en) * 1982-08-06 1984-02-09 Siemens AG, 1000 Berlin und 8000 München Method for monitoring a digital AF generator
DE3325290A1 (en) * 1983-07-13 1985-01-24 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for blocking voice information supplied by a subscriber station of a digital time-division multiplex telephone switching system in the outgoing direction of transmission

Also Published As

Publication number Publication date
ES456900A1 (en) 1978-02-16
GB1520233A (en) 1978-08-02
DE2710954C2 (en) 1984-05-30
FR2345023A1 (en) 1977-10-14
FR2345023B1 (en) 1981-09-04
DE2710954A1 (en) 1977-09-29
CH620560A5 (en) 1980-11-28

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