FR90216E - Receiving devices for direct current signals - Google Patents

Receiving devices for direct current signals

Info

Publication number
FR90216E
FR90216E FR65930A FR65930A FR90216E FR 90216 E FR90216 E FR 90216E FR 65930 A FR65930 A FR 65930A FR 65930 A FR65930 A FR 65930A FR 90216 E FR90216 E FR 90216E
Authority
FR
France
Prior art keywords
direct current
receiving devices
current signals
signals
devices
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
FR65930A
Other languages
French (fr)
Inventor
Eberhard Herter
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.)
International Standard Electric Corp
Original Assignee
International 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
Priority claimed from DEST18913A external-priority patent/DE1160902B/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to FR65930A priority Critical patent/FR90216E/en
Application granted granted Critical
Publication of FR90216E publication Critical patent/FR90216E/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
    • 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
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR65930A 1962-03-01 1966-06-17 Receiving devices for direct current signals Expired FR90216E (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR65930A FR90216E (en) 1962-03-01 1966-06-17 Receiving devices for direct current signals

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
DEST18913A DE1160902B (en) 1962-03-01 1962-03-01 Asymmetrical direct current signal process, especially for touch dialing in telephone systems
DEST20241A DE1173544B (en) 1962-03-01 1963-01-31 Asymmetrical direct current signal method over two-wire telecommunication lines, especially telephone lines
DEST22144A DE1217460B (en) 1962-03-01 1964-05-21 Asymmetrical direct current push-button selection process for telecommunications, especially telephone systems
DEST24001A DE1293873B (en) 1962-03-01 1965-06-19 Circuit arrangement for evaluating the loop status and for differentiating between loop resistances of a telecommunication line, in particular a telephone line
DEST24536A DE1278551B (en) 1962-03-01 1965-10-20 Circuit arrangement for monitoring the loop resistance of a telecommunication line, in particular a telephone line
DEST24545A DE1301841B (en) 1962-03-01 1965-10-22 Circuit arrangement for evaluating the loop status and for differentiating between loop resistances of a telecommunication line, in particular a telephone line
DEST25275A DE1301373B (en) 1962-03-01 1966-04-23 Circuit arrangement for evaluating the loop status and for differentiating between loop resistances of a telecommunication line, in particular a telephone line
FR65930A FR90216E (en) 1962-03-01 1966-06-17 Receiving devices for direct current signals

Publications (1)

Publication Number Publication Date
FR90216E true FR90216E (en) 1967-11-03

Family

ID=27570735

Family Applications (1)

Application Number Title Priority Date Filing Date
FR65930A Expired FR90216E (en) 1962-03-01 1966-06-17 Receiving devices for direct current signals

Country Status (1)

Country Link
FR (1) FR90216E (en)

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