CH416754A - Circuit arrangement for telephone systems with automatic adjustment of the attenuation difference of telephone subscriber lines of different lengths - Google Patents

Circuit arrangement for telephone systems with automatic adjustment of the attenuation difference of telephone subscriber lines of different lengths

Info

Publication number
CH416754A
CH416754A CH42265A CH42265A CH416754A CH 416754 A CH416754 A CH 416754A CH 42265 A CH42265 A CH 42265A CH 42265 A CH42265 A CH 42265A CH 416754 A CH416754 A CH 416754A
Authority
CH
Switzerland
Prior art keywords
telephone
circuit arrangement
different lengths
automatic adjustment
subscriber lines
Prior art date
Application number
CH42265A
Other languages
German (de)
Inventor
Hermann Dipl Phys Ritz
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 CH416754A publication Critical patent/CH416754A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Networks Using Active Elements (AREA)
CH42265A 1964-01-15 1965-01-13 Circuit arrangement for telephone systems with automatic adjustment of the attenuation difference of telephone subscriber lines of different lengths CH416754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0089064 1964-01-15

Publications (1)

Publication Number Publication Date
CH416754A true CH416754A (en) 1966-07-15

Family

ID=7514858

Family Applications (1)

Application Number Title Priority Date Filing Date
CH42265A CH416754A (en) 1964-01-15 1965-01-13 Circuit arrangement for telephone systems with automatic adjustment of the attenuation difference of telephone subscriber lines of different lengths

Country Status (6)

Country Link
BE (1) BE658384A (en)
CH (1) CH416754A (en)
DE (1) DE1437449B2 (en)
GB (1) GB1065941A (en)
NL (1) NL6413946A (en)
SE (1) SE331119B (en)

Also Published As

Publication number Publication date
DE1437449B2 (en) 1972-06-15
GB1065941A (en) 1967-04-19
SE331119B (en) 1970-12-14
DE1437449A1 (en) 1968-10-24
BE658384A (en) 1965-07-15
NL6413946A (en) 1965-07-16

Similar Documents

Publication Publication Date Title
CH397781A (en) Bracket for electroacoustic transmission systems
AT294630B (en) Automatic firearm
AT258166B (en) Automatic firearm
AT261446B (en) Automatic firearm
AT261445B (en) Automatic firearm
SE219013C1 (en) Digital multiplex transmission facility
AT306111B (en) Automatic level control device for telecommunications systems
AT300911B (en) Circuit arrangement for telecommunications systems with automatic adjustment of the attenuation difference of different lengths of subscriber lines
AT273244B (en) Speech-protected, frequency-selective signal receiver for telecommunications, especially telephone systems
DK110020C (en) Communication systems for transmitting signals.
CH414753A (en) Mechanical telephone directory
CH466375A (en) Automatic wake-up device for telephone subscribers
AT259024B (en) Device for carrier-frequency telephone transmission
CH374104A (en) Telecommunication system with relay-free subscriber line circuits
DK112803B (en) Telephone system with fully automatic connection of call connections.
CH452011A (en) Automatic telephone system with mobile telephone stations
AT244401B (en) Device for telephone subscriber connections
CH433461A (en) Self-connecting telephone system for subscriber sets with push-button dialer
AT257421B (en) Automatic firearm
NL151237B (en) AUTOMATIC TELEPHONE EXCHANGE.
AT265376B (en) Multi-channel telephone system with intermittent transmission
FR1394831A (en) Telephone installation
CA686468A (en) Automatic telephone systems
CA669945A (en) Subscriber line circuit with local ringing
AU287190B2 (en) Automatic monitoring circuit for step-by-step telephone systems