BE867511A - CIRCUIT ARRANGEMENT TO DISCONNECT A SOURCE OF NOISE OR SIGNAL FROM A KEYPAD SIGNAL RECEIVER - Google Patents

CIRCUIT ARRANGEMENT TO DISCONNECT A SOURCE OF NOISE OR SIGNAL FROM A KEYPAD SIGNAL RECEIVER

Info

Publication number
BE867511A
BE867511A BE2057019A BE2057019A BE867511A BE 867511 A BE867511 A BE 867511A BE 2057019 A BE2057019 A BE 2057019A BE 2057019 A BE2057019 A BE 2057019A BE 867511 A BE867511 A BE 867511A
Authority
BE
Belgium
Prior art keywords
signal
disconnect
noise
source
circuit arrangement
Prior art date
Application number
BE2057019A
Other languages
French (fr)
Inventor
W Ohl
G Rahmig
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 BE867511A publication Critical patent/BE867511A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
BE2057019A 1977-05-26 1978-05-26 CIRCUIT ARRANGEMENT TO DISCONNECT A SOURCE OF NOISE OR SIGNAL FROM A KEYPAD SIGNAL RECEIVER BE867511A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772723795 DE2723795A1 (en) 1977-05-26 1977-05-26 CIRCUIT ARRANGEMENT FOR THE SEPARATION OF A FAULT OR SIGNAL SOURCE FROM A TELEPHONE LINE OPERATED KEY-TELEPHONE

Publications (1)

Publication Number Publication Date
BE867511A true BE867511A (en) 1978-11-27

Family

ID=6009942

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2057019A BE867511A (en) 1977-05-26 1978-05-26 CIRCUIT ARRANGEMENT TO DISCONNECT A SOURCE OF NOISE OR SIGNAL FROM A KEYPAD SIGNAL RECEIVER

Country Status (5)

Country Link
BE (1) BE867511A (en)
BR (1) BR7803325A (en)
DE (1) DE2723795A1 (en)
FR (1) FR2392567A1 (en)
GB (1) GB1555002A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065598B1 (en) * 1981-05-15 1985-08-21 International Business Machines Corporation Improvements in telecommunication receivers
CH678782A5 (en) * 1989-05-31 1991-10-31 Siemens Ag Albis

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1339209A (en) * 1963-04-06 1963-10-04 Int Standard Electric Corp Voice frequency receiver
CH465677A (en) * 1963-04-06 1968-11-30 Standard Telephon & Radio Ag Circuit arrangement for the dialing devices of a telephone exchange
NL7113750A (en) * 1971-10-07 1973-04-10

Also Published As

Publication number Publication date
DE2723795A1 (en) 1978-12-07
FR2392567A1 (en) 1978-12-22
BR7803325A (en) 1979-02-20
GB1555002A (en) 1979-11-07

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