GB591495A - Improvements in telephone substation circuits of the anti-side-tone type - Google Patents

Improvements in telephone substation circuits of the anti-side-tone type

Info

Publication number
GB591495A
GB591495A GB10687/44A GB1068744A GB591495A GB 591495 A GB591495 A GB 591495A GB 10687/44 A GB10687/44 A GB 10687/44A GB 1068744 A GB1068744 A GB 1068744A GB 591495 A GB591495 A GB 591495A
Authority
GB
United Kingdom
Prior art keywords
line
direct current
resistance
suggested
impedance
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
GB10687/44A
Other languages
English (en)
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 Corp
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 GB591495A publication Critical patent/GB591495A/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
    • H04M1/58—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)
  • Thermistors And Varistors (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB10687/44A 1942-10-24 1944-06-02 Improvements in telephone substation circuits of the anti-side-tone type Expired GB591495A (en)

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
GB591495A true GB591495A (en) 1947-08-20

Family

ID=23839177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10687/44A Expired GB591495A (en) 1942-10-24 1944-06-02 Improvements in telephone substation circuits of the anti-side-tone type

Country Status (6)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE886766C (de) * 1951-03-03 1953-08-17 Normalzeit G M B H Einrichtung zur Verhinderung des unerlaubten Abhoerens von Telephongespraechen
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
DE1039104B (de) * 1951-04-18 1958-09-18 Int Standard Electric Corp Schaltungsanordnung fuer Fernsprech-stationen zur Verhinderung des Mithoerens der eigenen Sprache

Families Citing this family (11)

* 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 (enrdf_load_stackoverflow) * 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
BE505815A (enrdf_load_stackoverflow) * 1950-12-27
BE510745A (enrdf_load_stackoverflow) * 1951-04-18
BE539848A (enrdf_load_stackoverflow) * 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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Also Published As

Publication number Publication date
ES177484A1 (es) 1947-05-01
BE468046A (enrdf_load_stackoverflow)
NL64921C (enrdf_load_stackoverflow)
FR941331A (fr) 1949-01-07
US2387269A (en) 1945-10-23

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