ES177484A1 - UN SISTEMA TELEFoNICO - Google Patents

UN SISTEMA TELEFoNICO

Info

Publication number
ES177484A1
ES177484A1 ES0177484A ES177484A ES177484A1 ES 177484 A1 ES177484 A1 ES 177484A1 ES 0177484 A ES0177484 A ES 0177484A ES 177484 A ES177484 A ES 177484A ES 177484 A1 ES177484 A1 ES 177484A1
Authority
ES
Spain
Prior art keywords
line
telephone
impedance
exchange
currents
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
ES0177484A
Other languages
English (en)
Spanish (es)
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.)
AT&T Inc
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES177484A1 publication Critical patent/ES177484A1/es
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
    • H04M1/58—Anti-side-tone circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Function (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Thermistors And Varistors (AREA)
ES0177484A 1942-10-24 1947-03-18 UN SISTEMA TELEFoNICO Expired ES177484A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US463184A US2387269A (en) 1942-10-24 1942-10-24 Telephone system

Publications (1)

Publication Number Publication Date
ES177484A1 true ES177484A1 (es) 1947-05-01

Family

ID=23839177

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0177484A Expired ES177484A1 (es) 1942-10-24 1947-03-18 UN SISTEMA TELEFoNICO

Country Status (6)

Country Link
US (1) US2387269A (enExample)
BE (1) BE468046A (enExample)
ES (1) ES177484A1 (enExample)
FR (1) FR941331A (enExample)
GB (1) GB591495A (enExample)
NL (1) NL64921C (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518178A (en) * 1947-11-05 1950-08-08 Automatic Elect Lab Antisidetone and line balancing substation circuits for telephone systems
BE485032A (enExample) * 1947-12-22
US2568150A (en) * 1948-06-15 1951-09-18 Bell Telephone Labor Inc Balancing network for subscribers' telephone sets
US2604543A (en) * 1950-11-09 1952-07-22 Bell Telephone Labor Inc Equalizer circuit
NL82970C (enExample) * 1950-12-27
DE886766C (de) * 1951-03-03 1953-08-17 Normalzeit G M B H Einrichtung zur Verhinderung des unerlaubten Abhoerens von Telephongespraechen
DE1039104B (de) * 1951-04-18 1958-09-18 Int Standard Electric Corp Schaltungsanordnung fuer Fernsprech-stationen zur Verhinderung des Mithoerens der eigenen Sprache
BE510745A (enExample) * 1951-04-18
DE1038118B (de) * 1951-04-26 1958-09-04 Int Standard Electric Corp Schaltungsanordnung fuer Fernsprechstationen zur Verhinderung des Mithoerens der eigenen Sprache und von Raumgeraeuschen
BE539848A (enExample) * 1954-07-16
US3119063A (en) * 1961-01-13 1964-01-21 Gen Dynamics Corp Transmission line terminating impedance distinguishing circuit
DE1928434A1 (de) * 1969-06-04 1970-12-10 Siemens Ag Schaltungsanordnung zum Anschluss von Gleichstrom-Datenuebertragungssystemen mit niedriger Sendespannung an eine Datenvermittlung
NL7805416A (nl) * 1978-05-19 1979-11-21 Philips Nv Zelf-instellende vorkschakeling.
US6146056A (en) * 1998-01-14 2000-11-14 Jennmar Corporation Channel and bearing plate assembly

Also Published As

Publication number Publication date
GB591495A (en) 1947-08-20
BE468046A (enExample)
NL64921C (enExample)
US2387269A (en) 1945-10-23
FR941331A (fr) 1949-01-07

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