FR1542093A - Device for suppressing echoes in two-way telephone circuits - Google Patents

Device for suppressing echoes in two-way telephone circuits

Info

Publication number
FR1542093A
FR1542093A FR126375A FR126375A FR1542093A FR 1542093 A FR1542093 A FR 1542093A FR 126375 A FR126375 A FR 126375A FR 126375 A FR126375 A FR 126375A FR 1542093 A FR1542093 A FR 1542093A
Authority
FR
France
Prior art keywords
telephone circuits
way telephone
suppressing echoes
echoes
suppressing
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
FR126375A
Other languages
French (fr)
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
Priority to FR126375A priority Critical patent/FR1542093A/en
Application granted granted Critical
Publication of FR1542093A publication Critical patent/FR1542093A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/238—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using initial training sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR126375A 1966-10-31 1967-10-30 Device for suppressing echoes in two-way telephone circuits Expired FR1542093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR126375A FR1542093A (en) 1966-10-31 1967-10-30 Device for suppressing echoes in two-way telephone circuits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59058166A 1966-10-31 1966-10-31
FR126375A FR1542093A (en) 1966-10-31 1967-10-30 Device for suppressing echoes in two-way telephone circuits

Publications (1)

Publication Number Publication Date
FR1542093A true FR1542093A (en) 1968-10-11

Family

ID=26180410

Family Applications (1)

Application Number Title Priority Date Filing Date
FR126375A Expired FR1542093A (en) 1966-10-31 1967-10-30 Device for suppressing echoes in two-way telephone circuits

Country Status (1)

Country Link
FR (1) FR1542093A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452215A1 (en) * 1979-03-21 1980-10-17 Cit Alcatel Telephone subscriber microphone and loudspeaker unit - suppresses acoustic and electrically transferred echo using comparator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452215A1 (en) * 1979-03-21 1980-10-17 Cit Alcatel Telephone subscriber microphone and loudspeaker unit - suppresses acoustic and electrically transferred echo using comparator

Similar Documents

Publication Publication Date Title
FR1441855A (en) Improvements in protection devices for telephone lines
NL161638B (en) ECHO SUPPRESSION DEVICE.
NL153398B (en) DEVICE FOR ECHO SUPPRESSION.
CH502850A (en) Tank cleaning device
FR1536140A (en) Device intended to suppress vibrations in hydraulic circuits
FR1507204A (en) Watertight connection device
FR1542950A (en) Casting device
FR1542093A (en) Device for suppressing echoes in two-way telephone circuits
GB1201093A (en) Improvements in or relating to telephone line loop-detecting circuits
FR1378913A (en) Watertight closing device for pipes and in particular for vacuum circuits
FR1511755A (en) Anti-roll device for ship
FR1504861A (en) Device for connecting pipes
FR1412722A (en) Vehicle body protection device
AT289183B (en) Ditch cleaning device
FR1356422A (en) Closing device in particular for metal furniture
FR1503801A (en) Cleaning device
FR1508194A (en) Protection device for seawalls
FR1526559A (en) Device for turning box-shaped parts
FR1527999A (en) Improvement in fixed echo elimination devices
FR1508307A (en) Self-braking device for towed vehicle
FR1464763A (en) Device for cleaning vehicles
FR1349772A (en) Device for suppressing echoes in a two-way signaling circuit
FR1329039A (en) Device for mounting extension bars for supports in mines
FR1534591A (en) Anti-shock protection device for primers
FR1473219A (en) Device for connecting two pipes