GB303086A - Improvements in and relating to automatic or semi-automatic telephone systems - Google Patents

Improvements in and relating to automatic or semi-automatic telephone systems

Info

Publication number
GB303086A
GB303086A GB25508/27A GB2550827A GB303086A GB 303086 A GB303086 A GB 303086A GB 25508/27 A GB25508/27 A GB 25508/27A GB 2550827 A GB2550827 A GB 2550827A GB 303086 A GB303086 A GB 303086A
Authority
GB
United Kingdom
Prior art keywords
operator
relay
dialling
toll
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
GB25508/27A
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 BE354435D priority Critical patent/BE354435A/xx
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Priority to GB25508/27A priority patent/GB303086A/en
Priority to US235485A priority patent/US1786480A/en
Publication of GB303086A publication Critical patent/GB303086A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB25508/27A 1927-09-27 1927-09-27 Improvements in and relating to automatic or semi-automatic telephone systems Expired GB303086A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE354435D BE354435A (enrdf_load_stackoverflow) 1927-09-27
GB25508/27A GB303086A (en) 1927-09-27 1927-09-27 Improvements in and relating to automatic or semi-automatic telephone systems
US235485A US1786480A (en) 1927-09-27 1927-11-25 Toll-service trunking system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25508/27A GB303086A (en) 1927-09-27 1927-09-27 Improvements in and relating to automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
GB303086A true GB303086A (en) 1928-12-27

Family

ID=10228818

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25508/27A Expired GB303086A (en) 1927-09-27 1927-09-27 Improvements in and relating to automatic or semi-automatic telephone systems

Country Status (3)

Country Link
US (1) US1786480A (enrdf_load_stackoverflow)
BE (1) BE354435A (enrdf_load_stackoverflow)
GB (1) GB303086A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
US1786480A (en) 1930-12-30
BE354435A (enrdf_load_stackoverflow)

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