DK132360B - Apparat i telefoncentraler til brydning af ringestrømsignaler. - Google Patents

Apparat i telefoncentraler til brydning af ringestrømsignaler.

Info

Publication number: DK132360B
Authority: DK; Denmark
Prior art keywords: current signals; ring current; telephone exchanges; breaking ring; breaking
Prior art date: 1970-03-19

Application number

DK132271AA

Other languages

English (en)

Other versions

DK132360C (da

Inventor

C O B Sandberg

Original Assignee

Ericsson Telefon Ab L M

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.)

1970-03-19

Filing date

1971-03-18

Publication date

1975-11-24

1971-03-18 Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M

1975-11-24 Publication of DK132360B publication Critical patent/DK132360B/da

1976-05-03 Application granted granted Critical

1976-05-03 Publication of DK132360C publication Critical patent/DK132360C/da

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/026—Arrangements for interrupting the ringing current

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Devices For Supply Of Signal Current (AREA)
Interface Circuits In Exchanges (AREA)
Cereal-Derived Products (AREA)

DK132271A 1970-03-19 1971-03-18 Apparat i telefoncentraler til brydning af ringestromsignaler DK132360C (da)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
SE03787/70A SE340297B (da)	1970-03-19	1970-03-19

Publications (2)

Publication Number	Publication Date
DK132360B true DK132360B (da)	1975-11-24
DK132360C DK132360C (da)	1976-05-03

Family

ID=20262864

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK132271A DK132360C (da)	1970-03-19	1971-03-18	Apparat i telefoncentraler til brydning af ringestromsignaler

Country Status (14)

Country	Link
US (1)	US3715517A (da)
BE (1)	BE764519A (da)
CA (1)	CA927535A (da)
DE (1)	DE2110719A1 (da)
DK (1)	DK132360C (da)
ES (1)	ES389333A1 (da)
FR (1)	FR2084856A5 (da)
GB (1)	GB1293294A (da)
HU (1)	HU164738B (da)
NL (1)	NL7103265A (da)
NO (1)	NO127273B (da)
PL (1)	PL83144B1 (da)
SE (1)	SE340297B (da)
SU (1)	SU370814A3 (da)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1373624A (en) *	1916-05-10	1921-04-05	Automatic Electric Co	Automatic telephone system
NL267227A (da) *	1960-07-21
US3621143A (en) *	1969-04-04	1971-11-16	Lorain Prod Corp	Current-controlled voltage booster for telephone systems

1970
- 1970-03-19 SE SE03787/70A patent/SE340297B/xx unknown
1971
- 1971-03-01 CA CA106535A patent/CA927535A/en not_active Expired
- 1971-03-04 DE DE19712110719 patent/DE2110719A1/de active Pending
- 1971-03-05 HU HUEI373A patent/HU164738B/hu unknown
- 1971-03-08 US US00121922A patent/US3715517A/en not_active Expired - Lifetime
- 1971-03-09 SU SU1628151A patent/SU370814A3/ru active
- 1971-03-11 NL NL7103265A patent/NL7103265A/xx unknown
- 1971-03-18 DK DK132271A patent/DK132360C/da active
- 1971-03-18 PL PL1971146998A patent/PL83144B1/pl unknown
- 1971-03-18 FR FR7109618A patent/FR2084856A5/fr not_active Expired
- 1971-03-18 NO NO01065/71A patent/NO127273B/no unknown
- 1971-03-18 ES ES389333A patent/ES389333A1/es not_active Expired
- 1971-03-19 BE BE764519A patent/BE764519A/xx unknown
- 1971-04-19 GB GB22997/71A patent/GB1293294A/en not_active Expired

Also Published As

Publication number	Publication date
CA927535A (en)	1973-05-29
PL83144B1 (da)	1975-12-31
BE764519A (fr)	1971-08-16
NL7103265A (da)	1971-09-21
GB1293294A (en)	1972-10-18
ES389333A1 (es)	1973-06-01
SU370814A3 (da)	1973-02-15
HU164738B (da)	1974-04-11
DE2110719A1 (de)	1971-10-07
DK132360C (da)	1976-05-03
FR2084856A5 (da)	1971-12-17
US3715517A (en)	1973-02-06
NO127273B (da)	1973-05-28
SE340297B (da)	1971-11-15

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