GB342726A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB342726A
GB342726A GB3367429A GB3367429A GB342726A GB 342726 A GB342726 A GB 342726A GB 3367429 A GB3367429 A GB 3367429A GB 3367429 A GB3367429 A GB 3367429A GB 342726 A GB342726 A GB 342726A
Authority
GB
United Kingdom
Prior art keywords
exchange
local
party
depressed
battery
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
GB3367429A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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
Priority to BE374665D priority Critical patent/BE374665A/xx
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Priority to GB3367429A priority patent/GB342726A/en
Publication of GB342726A publication Critical patent/GB342726A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
GB3367429A 1929-11-05 1929-11-05 Improvements in or relating to telephone systems Expired GB342726A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE374665D BE374665A (enrdf_load_stackoverflow) 1929-11-05
GB3367429A GB342726A (en) 1929-11-05 1929-11-05 Improvements in or relating to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3367429A GB342726A (en) 1929-11-05 1929-11-05 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB342726A true GB342726A (en) 1931-02-05

Family

ID=10355960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3367429A Expired GB342726A (en) 1929-11-05 1929-11-05 Improvements in or relating to telephone systems

Country Status (2)

Country Link
BE (1) BE374665A (enrdf_load_stackoverflow)
GB (1) GB342726A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541336A (en) * 1948-08-23 1951-02-13 Automatic Elect Lab Secretary's answering key cabinet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541336A (en) * 1948-08-23 1951-02-13 Automatic Elect Lab Secretary's answering key cabinet

Also Published As

Publication number Publication date
BE374665A (enrdf_load_stackoverflow)

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