AT375509B - LINE AMPLIFIER FOR FOUR-WIRE MESSAGE TRANSMISSION DEVICES - Google Patents

LINE AMPLIFIER FOR FOUR-WIRE MESSAGE TRANSMISSION DEVICES

Info

Publication number
AT375509B
AT375509B AT0857578A AT857578A AT375509B AT 375509 B AT375509 B AT 375509B AT 0857578 A AT0857578 A AT 0857578A AT 857578 A AT857578 A AT 857578A AT 375509 B AT375509 B AT 375509B
Authority
AT
Austria
Prior art keywords
message transmission
transmission devices
line amplifier
wire message
wire
Prior art date
Application number
AT0857578A
Other languages
German (de)
Other versions
ATA857578A (en
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of ATA857578A publication Critical patent/ATA857578A/en
Application granted granted Critical
Publication of AT375509B publication Critical patent/AT375509B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Fire Alarms (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
AT0857578A 1977-11-30 1978-11-30 LINE AMPLIFIER FOR FOUR-WIRE MESSAGE TRANSMISSION DEVICES AT375509B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2753465A DE2753465C2 (en) 1977-11-30 1977-11-30 Line amplifier for four-wire communications equipment

Publications (2)

Publication Number Publication Date
ATA857578A ATA857578A (en) 1983-12-15
AT375509B true AT375509B (en) 1984-08-10

Family

ID=6025020

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0857578A AT375509B (en) 1977-11-30 1978-11-30 LINE AMPLIFIER FOR FOUR-WIRE MESSAGE TRANSMISSION DEVICES

Country Status (10)

Country Link
JP (1) JPS54100212A (en)
AT (1) AT375509B (en)
AU (1) AU515433B2 (en)
DE (1) DE2753465C2 (en)
DK (1) DK534678A (en)
IT (1) IT1101136B (en)
NL (1) NL7811729A (en)
NO (1) NO145969C (en)
SE (1) SE7812133L (en)
YU (1) YU40050B (en)

Also Published As

Publication number Publication date
NO784019L (en) 1979-05-31
NO145969C (en) 1982-06-30
JPS54100212A (en) 1979-08-07
IT1101136B (en) 1985-09-28
ATA857578A (en) 1983-12-15
IT7830133A0 (en) 1978-11-24
DK534678A (en) 1979-05-31
SE7812133L (en) 1979-05-31
YU281178A (en) 1983-04-30
NL7811729A (en) 1979-06-01
NO145969B (en) 1982-03-22
DE2753465C2 (en) 1979-10-04
DE2753465B1 (en) 1979-01-18
AU4179778A (en) 1979-06-07
YU40050B (en) 1985-06-30
AU515433B2 (en) 1981-04-02

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Legal Events

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