CH481538A - Circuit arrangement for loop current monitoring - Google Patents

Circuit arrangement for loop current monitoring

Info

Publication number
CH481538A
CH481538A CH1544868A CH1544868A CH481538A CH 481538 A CH481538 A CH 481538A CH 1544868 A CH1544868 A CH 1544868A CH 1544868 A CH1544868 A CH 1544868A CH 481538 A CH481538 A CH 481538A
Authority
CH
Switzerland
Prior art keywords
circuit arrangement
current monitoring
loop current
loop
monitoring
Prior art date
Application number
CH1544868A
Other languages
German (de)
Inventor
Hovorka Guenter
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.)
Filing date
Publication date
Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of CH481538A publication Critical patent/CH481538A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)
CH1544868A 1967-10-20 1968-10-16 Circuit arrangement for loop current monitoring CH481538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT946667A AT287074B (en) 1967-10-20 1967-10-20 Circuit arrangement for determining the existence of loop states in a telephone private branch exchange

Publications (1)

Publication Number Publication Date
CH481538A true CH481538A (en) 1969-11-15

Family

ID=3614390

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1544868A CH481538A (en) 1967-10-20 1968-10-16 Circuit arrangement for loop current monitoring

Country Status (3)

Country Link
AT (1) AT287074B (en)
CH (1) CH481538A (en)
DE (1) DE1803995A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007001413A1 (en) * 2007-01-09 2008-07-10 Siemens Ag contraption

Also Published As

Publication number Publication date
DE1803995A1 (en) 1969-08-21
AT287074B (en) 1971-01-11

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Legal Events

Date Code Title Description
PL Patent ceased