CA1027272A - Modem-exchange interface for telecommunications systems - Google Patents

Modem-exchange interface for telecommunications systems

Info

Publication number: CA1027272A
Authority: CA; Canada
Prior art keywords: modem; telecommunications systems; exchange interface; exchange; interface
Prior art date: 1974-05-09
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

CA226,410A

Other languages

English (en)

French (fr)

Inventor

Bernd Refflinghaus

Jurgen Lahmer

Johannes Dornaus

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.)

Koninklijke Philips NV

Original Assignee

Philips Gloeilampenfabrieken NV

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.)

1974-05-09

Filing date

1975-05-06

Publication date

1978-02-28

1975-05-06 Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV

1978-02-28 Application granted granted Critical

1978-02-28 Publication of CA1027272A publication Critical patent/CA1027272A/en

Status Expired legal-status Critical Current

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Telephonic Communication Services (AREA)
Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Amplifiers (AREA)
Control Of Eletrric Generators (AREA)

CA226,410A 1974-05-09 1975-05-06 Modem-exchange interface for telecommunications systems Expired CA1027272A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE19742422504 DE2422504B2 (de)	1974-05-09	1974-05-09	Nachrichtenuebertragungssystem

Publications (1)

Publication Number	Publication Date
CA1027272A true CA1027272A (en)	1978-02-28

Family

ID=5915092

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA226,410A Expired CA1027272A (en)	1974-05-09	1975-05-06	Modem-exchange interface for telecommunications systems

Country Status (15)

Country	Link
US (1)	US4013956A (pt)
JP (1)	JPS5548743B2 (pt)
AT (1)	AT342669B (pt)
BE (1)	BE828826A (pt)
BR (1)	BR7502797A (pt)
CA (1)	CA1027272A (pt)
CH (1)	CH592393A5 (pt)
DE (1)	DE2422504B2 (pt)
DK (1)	DK140967C (pt)
FR (1)	FR2270739B1 (pt)
GB (1)	GB1509225A (pt)
IT (1)	IT1032821B (pt)
NL (1)	NL174692C (pt)
NO (1)	NO139841C (pt)
SE (1)	SE398429B (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4310721A (en) *	1980-01-23	1982-01-12	The United States Of America As Represented By The Secretary Of The Army	Half duplex integral vocoder modem system
US4631733A (en) *	1984-12-17	1986-12-23	Honeywell Inc.	Transceiver
US4812840A (en) *	1987-06-29	1989-03-14	Ncr Corporation	Multiple mode switching means

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3254159A (en) *	1962-04-10	1966-05-31	Bio Tronics Res Inc	Telephone adapter
US3366880A (en) *	1965-11-08	1968-01-30	American Tele Extension Co	Tone controlled wireless telephone extension system
US3917907A (en) *	1971-01-12	1975-11-04	Northeast Electronics Corp	Methods and apparatus for 4-wire switching
US3743938A (en) *	1971-08-10	1973-07-03	Gen Datacomm Ind Inc	Closed data loop test apparatus for data transmission modem

1974
- 1974-05-09 DE DE19742422504 patent/DE2422504B2/de active Granted
1975
- 1975-05-05 US US05/574,614 patent/US4013956A/en not_active Expired - Lifetime
- 1975-05-06 NL NLAANVRAGE7505278,A patent/NL174692C/xx not_active IP Right Cessation
- 1975-05-06 IT IT68151/75A patent/IT1032821B/it active
- 1975-05-06 CH CH582575A patent/CH592393A5/xx not_active IP Right Cessation
- 1975-05-06 JP JP5330475A patent/JPS5548743B2/ja not_active Expired
- 1975-05-06 DK DK199575A patent/DK140967C/da not_active IP Right Cessation
- 1975-05-06 GB GB18959/75A patent/GB1509225A/en not_active Expired
- 1975-05-06 NO NO751617A patent/NO139841C/no unknown
- 1975-05-06 CA CA226,410A patent/CA1027272A/en not_active Expired
- 1975-05-07 AT AT351475A patent/AT342669B/de not_active IP Right Cessation
- 1975-05-07 FR FR7514334A patent/FR2270739B1/fr not_active Expired
- 1975-05-07 BR BR3568/75D patent/BR7502797A/pt unknown
- 1975-05-07 BE BE156142A patent/BE828826A/xx not_active IP Right Cessation
- 1975-11-10 SE SE7505203A patent/SE398429B/xx not_active IP Right Cessation

Also Published As

Publication number	Publication date
NO139841B (no)	1979-02-05
NO751617L (pt)	1975-11-11
GB1509225A (en)	1978-05-04
IT1032821B (it)	1979-06-20
NO139841C (no)	1979-05-16
US4013956A (en)	1977-03-22
JPS50153810A (pt)	1975-12-11
DK199575A (da)	1975-11-10
AU8090975A (en)	1976-11-11
FR2270739B1 (pt)	1978-02-24
AT342669B (de)	1978-04-10
DK140967B (da)	1979-12-10
DE2422504B2 (de)	1977-09-29
BE828826A (fr)	1975-11-07
ATA351475A (de)	1977-08-15
SE398429B (sv)	1977-12-19
DK140967C (da)	1980-05-27
JPS5548743B2 (pt)	1980-12-08
CH592393A5 (pt)	1977-10-31
DE2422504A1 (de)	1975-11-20
BR7502797A (pt)	1976-03-16
NL7505278A (nl)	1975-11-11
DE2422504C3 (pt)	1978-06-01
NL174692B (nl)	1984-02-16
FR2270739A1 (pt)	1975-12-05
NL174692C (nl)	1984-07-16
SE7505203L (sv)	1975-11-10

Publication	Publication Date	Title
AU499269B2 (en)	1979-04-12	Telecommunication assembly
GB1508121A (en)	1978-04-19	Optical communications systems
AU500019B2 (en)	1979-05-10	Cabletelevision system
CA1031953A (en)	1978-05-30	Glass-reacted-ceramic system
AU500103B2 (en)	1979-05-10	Communication system
AU501571B2 (en)	1979-06-21	Communications system
AU500411B2 (en)	1979-05-24	Telephone exchange systems
AU497191B2 (en)	1978-12-07	Spc telecommunication system
AU502744B2 (en)	1979-08-09	Telecommunications exchange systems
CA1027272A (en)	1978-02-28	Modem-exchange interface for telecommunications systems
CA1025969A (en)	1978-02-07	Component terminal system
AU496506B2 (en)	1976-12-16	Telecommunication systems
AU487856B2 (en)	1976-12-16	Telecommunication systems
AU494363B2 (en)	1976-11-11	Telecommunication system
AU8211575A (en)	1976-12-16	Telecommunication systems
AU8211675A (en)	1976-12-16	Telecommunication systems
AU490487B1 (en)	1976-08-26	Ticketing system
CA1031445A (en)	1978-05-16	Vehicle-emergency call system
AU485576B2 (en)		Automatic telephone systems
AU494880B2 (en)	1976-12-16	Communication system
AU500278B2 (en)	1979-05-17	Subscriber multiplex systems
AU494536B2 (en)	1976-07-01	Telecommunication exchange systems
AU494622B2 (en)	1974-05-19	Telephone line control system
CA1004334A (en)	1977-01-25	Interface for control systems
AU478034B2 (en)	1975-10-09	Function block oriented spc system