BE479847A - - Google Patents

Info

Publication number: BE479847A
Authority: BE; Belgium

Application number

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.)

1945-06-15

Publication of BE479847A publication Critical patent/BE479847A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- 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
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Devices For Supply Of Signal Current (AREA)
Sub-Exchange Stations And Push- Button Telephones (AREA)
Interface Circuits In Exchanges (AREA)

BE479847D 1945-06-15 BE479847A (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US599537A US2422700A (en)	1945-06-15	1945-06-15	Reciprocal signaling trunk telephone system

Publications (1)

Publication Number	Publication Date
BE479847A true BE479847A (xx)

Family

ID=24400029

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE479847D BE479847A (xx)	1945-06-15

Country Status (6)

Country	Link
US (1)	US2422700A (xx)
BE (1)	BE479847A (xx)
CH (1)	CH281613A (xx)
FR (1)	FR959395A (xx)
GB (1)	GB640108A (xx)
NL (1)	NL78127C (xx)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1512907A (en) *		1924-10-28		Assig-nor to western electric com
US1449644A (en) *	1919-12-30	1923-03-27	Western Electric Co	Telephone system
US2005836A (en) *	1933-08-29	1935-06-25	American Telephone & Telegraph	Signaling system
GB567049A (en) *	1943-07-21	1945-01-25	Automatic Telephone & Elect	Improvements in telephone or like signalling systems

0
- BE BE479847D patent/BE479847A/xx unknown
- NL NL78127D patent/NL78127C/xx active
- FR FR959395D patent/FR959395A/fr not_active Expired
1945
- 1945-06-15 US US599537A patent/US2422700A/en not_active Expired - Lifetime
1947
- 1947-12-13 CH CH281613D patent/CH281613A/de unknown
1948
- 1948-02-20 GB GB5098/48A patent/GB640108A/en not_active Expired

Also Published As

Publication number	Publication date
US2422700A (en)	1947-06-24
GB640108A (en)	1950-07-12
CH281613A (de)	1952-03-15
FR959395A (xx)	1950-03-29
NL78127C (xx)

Publication	Publication Date	Title
FR955898A (xx)	1950-01-20
DE2462615A1 (xx)
FR958632A (xx)	1950-03-15
FR957388A (xx)	1950-02-18
FR915350A (xx)	1946-11-26
FR958074A (xx)	1950-03-03
FR958043A (xx)	1950-03-02
FR1019578A (xx)	1953-01-23
FR958723A (xx)	1950-03-17
FR55254E (xx)	1952-01-09
FR915005A (xx)	1946-10-24
FR895900A (xx)	1945-02-14
FR895950A (xx)	1945-02-12
BE472337A (xx)
BE477947A (xx)
BE467361A (xx)
BE467433A (xx)
BE467640A (xx)
BE468478A (xx)
BE469706A (xx)
BE470043A (xx)
BE470393A (xx)
BE470949A (xx)
BE471918A (xx)
BE466133A (xx)