GB298164A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB298164A
GB298164A GB28467/28A GB2846728A GB298164A GB 298164 A GB298164 A GB 298164A GB 28467/28 A GB28467/28 A GB 28467/28A GB 2846728 A GB2846728 A GB 2846728A GB 298164 A GB298164 A GB 298164A
Authority
GB
United Kingdom
Prior art keywords
relay
exchange
tandem
relays
over
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
GB28467/28A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB298164A publication Critical patent/GB298164A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB28467/28A 1927-10-04 1928-10-04 Improvements in telephone systems Expired GB298164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US223880A US1678103A (en) 1927-10-04 1927-10-04 Telephone system

Publications (1)

Publication Number Publication Date
GB298164A true GB298164A (en) 1930-01-06

Family

ID=22838336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28467/28A Expired GB298164A (en) 1927-10-04 1928-10-04 Improvements in telephone systems

Country Status (3)

Country Link
US (1) US1678103A (enrdf_load_stackoverflow)
FR (1) FR658366A (enrdf_load_stackoverflow)
GB (1) GB298164A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3377429A (en) * 1960-07-20 1968-04-09 Marathon Oil Co Audio readout of remotely located meter

Also Published As

Publication number Publication date
US1678103A (en) 1928-07-24
FR658366A (enrdf_load_stackoverflow) 1929-06-14

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