CH304196A - Fernsprechsystem mit Teilnehmerapparat. - Google Patents

Fernsprechsystem mit Teilnehmerapparat.

Info

Publication number: CH304196A
Authority: CH; Switzerland
Prior art keywords: telephone system; subscriber set; subscriber; telephone
Prior art date: 1950-12-27

Application number

Other languages

English (en)

Inventor

Incorporated Western E Company

Original Assignee

Western Electric Co

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.)

1950-12-27

Filing date

1951-09-28

Publication date

1954-12-31

1951-09-28 Application filed by Western Electric Co filed Critical Western Electric Co

1954-12-31 Publication of CH304196A publication Critical patent/CH304196A/de

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
- 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)
Interface Circuits In Exchanges (AREA)
Devices For Supply Of Signal Current (AREA)
Telephonic Communication Services (AREA)

CH304196D 1950-12-27 1951-09-28 Fernsprechsystem mit Teilnehmerapparat. CH304196A (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US202887A US2629783A (en)	1950-12-27	1950-12-27	Telephone circuit

Publications (1)

Publication Number	Publication Date
CH304196A true CH304196A (de)	1954-12-31

Family

ID=22751632

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CH304196D CH304196A (de)	1950-12-27	1951-09-28	Fernsprechsystem mit Teilnehmerapparat.

Country Status (6)

Country	Link
US (1)	US2629783A (de)
BE (1)	BE505815A (de)
CH (1)	CH304196A (de)
FR (1)	FR1109009A (de)
GB (1)	GB694705A (de)
NL (1)	NL82970C (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE510745A (de) *	1951-04-18
DE1002399B (de) *	1955-12-30	1957-02-14	Siemens Ag	Schaltungsanordnung zur selbsttaetigen Regelung der Rueckhoerdaempfung von Fernsprechstationen
US3020351A (en) *	1957-03-20	1962-02-06	Gen Dynamics Corp	Directional coupling network
US3130274A (en) *	1960-10-20	1964-04-21	Itt	2-or 4-wire telephone set
GB1164931A (en) *	1967-01-04	1969-09-24	Standard Telephones Cables Ltd	Automatic Regulation of Telephone Sets.
US3517138A (en) *	1967-09-25	1970-06-23	Automatic Elect Lab	Long loop anti-side-tone telephone circuit
US4132863A (en) *	1977-12-20	1979-01-02	Bell Telephone Laboratories, Incorporated	Automatic gain and return loss compensating line circuit
US4216356A (en) *	1979-02-21	1980-08-05	Bell Telephone Laboratories, Incorporated	Telephone having separate voice and signaling pairs
US5471527A (en) *	1993-12-02	1995-11-28	Dsc Communications Corporation	Voice enhancement system and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2287998A (en) *	1939-06-10	1942-06-30	Bell Telephone Labor Inc	Telephone circuit
US2288049A (en) *	1939-06-10	1942-06-30	Bell Telephone Labor Inc	Telephone set circuit
NL64921C (de) *	1942-10-24

0
- NL NL82970D patent/NL82970C/xx active
- BE BE505815D patent/BE505815A/xx unknown
1950
- 1950-12-27 US US202887A patent/US2629783A/en not_active Expired - Lifetime
1951
- 1951-06-12 FR FR1109009D patent/FR1109009A/fr not_active Expired
- 1951-09-28 CH CH304196D patent/CH304196A/de unknown
- 1951-12-18 GB GB29632/51A patent/GB694705A/en not_active Expired

Also Published As

Publication number	Publication date
FR1109009A (fr)	1956-01-20
GB694705A (en)	1953-07-22
BE505815A (de)
US2629783A (en)	1953-02-24
NL82970C (de)

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