GB191407327A - Improvements in Apparatus for Supervising Telephone Exchanges Working on a Semi-automatic System. - Google Patents

Improvements in Apparatus for Supervising Telephone Exchanges Working on a Semi-automatic System.

Info

Publication number
GB191407327A
GB191407327A GB191407327DA GB191407327A GB 191407327 A GB191407327 A GB 191407327A GB 191407327D A GB191407327D A GB 191407327DA GB 191407327 A GB191407327 A GB 191407327A
Authority
GB
United Kingdom
Prior art keywords
supervisor
keyboard
impulses
semi
supervising
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens 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 Siemens and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of GB191407327A publication Critical patent/GB191407327A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/62—Keyboard equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Meter Arrangements (AREA)
GB191407327D 1913-03-25 1914-03-23 Improvements in Apparatus for Supervising Telephone Exchanges Working on a Semi-automatic System. Expired GB191407327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191407327X 1913-03-25

Publications (1)

Publication Number Publication Date
GB191407327A true GB191407327A (en) 1915-06-17

Family

ID=32604936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191407327D Expired GB191407327A (en) 1913-03-25 1914-03-23 Improvements in Apparatus for Supervising Telephone Exchanges Working on a Semi-automatic System.

Country Status (3)

Country Link
DE (2) DE292386C (enrdf_load_stackoverflow)
GB (1) GB191407327A (enrdf_load_stackoverflow)
NL (1) NL3569C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE293878C (enrdf_load_stackoverflow)
DE292386C (enrdf_load_stackoverflow)
NL3569C (enrdf_load_stackoverflow)

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