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GB284335A - Improvements in or relating to automatic telephone systems - Google Patents

Improvements in or relating to automatic telephone systems

Info

Publication number
GB284335A
GB284335A GB2458/28A GB245828A GB284335A GB 284335 A GB284335 A GB 284335A GB 2458/28 A GB2458/28 A GB 2458/28A GB 245828 A GB245828 A GB 245828A GB 284335 A GB284335 A GB 284335A
Authority
GB
United Kingdom
Prior art keywords
toll
operator
relay
contacts
test relay
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
GB2458/28A
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
Publication of GB284335A publication Critical patent/GB284335A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Meter Arrangements (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB2458/28A 1927-01-29 1928-01-25 Improvements in or relating to automatic telephone systems Expired GB284335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE284335X 1927-01-29

Publications (1)

Publication Number Publication Date
GB284335A true GB284335A (en) 1929-04-18

Family

ID=6051399

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2458/28A Expired GB284335A (en) 1927-01-29 1928-01-25 Improvements in or relating to automatic telephone systems

Country Status (2)

Country Link
FR (1) FR647776A (fr)
GB (1) GB284335A (fr)

Also Published As

Publication number Publication date
FR647776A (fr) 1928-11-30

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