AT315249B - Circuit arrangement for establishing the operating status of subscriber lines in telephone systems - Google Patents

Circuit arrangement for establishing the operating status of subscriber lines in telephone systems

Info

Publication number: AT315249B
Authority: AT; Austria
Prior art keywords: establishing; circuit arrangement; operating status; subscriber lines; telephone systems
Prior art date: 1970-12-23

Application number

AT1084371A

Other languages

German (de)

Original Assignee

Int Standard Electric Corp

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.)

1970-12-23

Filing date

1971-12-17

Publication date

1974-05-10

1971-12-17 Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp

1974-05-10 Application granted granted Critical

1974-05-10 Publication of AT315249B publication Critical patent/AT315249B/en

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Monitoring And Testing Of Exchanges (AREA)
Interface Circuits In Exchanges (AREA)
Mobile Radio Communication Systems (AREA)

AT1084371A 1970-12-23 1971-12-17 Circuit arrangement for establishing the operating status of subscriber lines in telephone systems AT315249B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR7046461A FR2119188A5 (en)	1970-12-23	1970-12-23

Publications (1)

Publication Number	Publication Date
AT315249B true AT315249B (en)	1974-05-10

Family

ID=9066266

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
AT1084371A AT315249B (en)	1970-12-23	1971-12-17	Circuit arrangement for establishing the operating status of subscriber lines in telephone systems

Country Status (14)

Country	Link
AT (1)	AT315249B (en)
AU (1)	AU464484B2 (en)
BE (1)	BE777084A (en)
BR (1)	BR7108538D0 (en)
CA (1)	CA938040A (en)
CH (1)	CH554624A (en)
ES (1)	ES398234A1 (en)
FR (1)	FR2119188A5 (en)
GB (1)	GB1355129A (en)
IT (1)	IT944014B (en)
NL (1)	NL7117638A (en)
NO (1)	NO136386C (en)
SE (1)	SE369263B (en)
SU (1)	SU584819A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
ZA74205B (en) *	1973-02-12	1974-11-27	Int Standard Electric Corp	Line condition signalling system

1970
- 1970-12-23 FR FR7046461A patent/FR2119188A5/fr not_active Expired
1971
- 1971-12-02 AU AU36455/71A patent/AU464484B2/en not_active Expired
- 1971-12-16 IT IT3246471A patent/IT944014B/en active
- 1971-12-16 NO NO464471A patent/NO136386C/en unknown
- 1971-12-16 GB GB5842971A patent/GB1355129A/en not_active Expired
- 1971-12-17 AT AT1084371A patent/AT315249B/en not_active IP Right Cessation
- 1971-12-20 SU SU7101727209A patent/SU584819A3/en active
- 1971-12-21 SE SE1636871A patent/SE369263B/xx unknown
- 1971-12-22 NL NL7117638A patent/NL7117638A/xx not_active Application Discontinuation
- 1971-12-22 ES ES398234A patent/ES398234A1/en not_active Expired
- 1971-12-22 BE BE777084A patent/BE777084A/en unknown
- 1971-12-22 CH CH1871171A patent/CH554624A/en not_active IP Right Cessation
- 1971-12-22 CA CA130878A patent/CA938040A/en not_active Expired
- 1971-12-23 BR BR853871A patent/BR7108538D0/en unknown

Also Published As

Publication number	Publication date
CH554624A (en)	1974-09-30
DE2162964A1 (en)	1972-07-13
CA938040A (en)	1973-12-04
FR2119188A5 (en)	1972-08-04
NO136386C (en)	1977-08-31
SE369263B (en)	1974-08-12
BE777084A (en)	1972-06-22
BR7108538D0 (en)	1973-05-31
NO136386B (en)	1977-05-16
NL7117638A (en)	1972-06-27
AU3645571A (en)	1973-06-07
GB1355129A (en)	1974-06-05
AU464484B2 (en)	1975-08-28
SU584819A3 (en)	1977-12-15
ES398234A1 (en)	1975-03-16
IT944014B (en)	1973-04-20
DE2162964B2 (en)	1976-01-02

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Legal Events

Date	Code	Title	Description
1980-06-15	ELJ	Ceased due to non-payment of the annual fee