NL21064C - - Google Patents

Info

Publication number
NL21064C
NL21064C NL21064DA NL21064C NL 21064 C NL21064 C NL 21064C NL 21064D A NL21064D A NL 21064DA NL 21064 C NL21064 C NL 21064C
Authority
NL
Netherlands
Application number
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.)
Publication of NL21064C publication Critical patent/NL21064C/xx

Links

Classifications

    • 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
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
NL21064D 1925-10-23 NL21064C (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64293A US1689598A (en) 1925-10-23 1925-10-23 Telephone substation circuits

Publications (1)

Publication Number Publication Date
NL21064C true NL21064C (fr)

Family

ID=22054919

Family Applications (1)

Application Number Title Priority Date Filing Date
NL21064D NL21064C (fr) 1925-10-23

Country Status (5)

Country Link
US (1) US1689598A (fr)
BE (1) BE336202A (fr)
DE (1) DE583007C (fr)
GB (1) GB260214A (fr)
NL (1) NL21064C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643300A (en) * 1947-11-04 1953-06-23 Siemens Ag Albis Telephone subscriber set with sidetone reduction for central battery systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643300A (en) * 1947-11-04 1953-06-23 Siemens Ag Albis Telephone subscriber set with sidetone reduction for central battery systems

Also Published As

Publication number Publication date
DE583007C (de) 1933-08-26
BE336202A (fr)
GB260214A (en) 1927-10-12
US1689598A (en) 1928-10-30

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