GB288996A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB288996A
GB288996A GB11497/28A GB1149728A GB288996A GB 288996 A GB288996 A GB 288996A GB 11497/28 A GB11497/28 A GB 11497/28A GB 1149728 A GB1149728 A GB 1149728A GB 288996 A GB288996 A GB 288996A
Authority
GB
United Kingdom
Prior art keywords
exchange
tandem
automatic
manual
register
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
GB11497/28A
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
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Publication of GB288996A publication Critical patent/GB288996A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

288,996. Associated Telephone & Telegraph Co., (Assignees of Stehlik, R. F.). July 19, 1926, [Convention date]. Divided on 274,518. Drawings to Specification. Automatic and manual exchange systems. - For calls from an automatic exchange through one or more intermediate automatic exchanges to a manual exchange provided with call-indicator equipment, a register-controller at the criginating exchange after sending out the necessary routing digits transmits a signal to the manualexchange operator who connects up her call-indicator equipment and sends back a signal which causes the repeaters to be cut out, at each of the intermediate exchanges thus establishing a through metallic connection over which the register-controller transmits the remaining digits in code. The manual exchange may be employed for tandem connection to a further manual exchange, the first two lamp banks of the callindicator denoting the wanted exchange and the indicator serving also to control ringing from the tandem cord-circuit so that this only takes place when a subscriber in the tandem exchange is required. The invention is described with reference to a system identical with that described in Specification 274,518.
GB11497/28A 1926-07-19 1927-07-19 Improvements in telephone systems Expired GB288996A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US274518XA 1926-07-19 1926-07-19
US288996XA 1926-07-19 1926-07-19

Publications (1)

Publication Number Publication Date
GB288996A true GB288996A (en) 1928-10-19

Family

ID=26702498

Family Applications (2)

Application Number Title Priority Date Filing Date
GB19184/27A Expired GB274518A (en) 1926-07-19 1927-07-19 Improvements in telephone systems
GB11497/28A Expired GB288996A (en) 1926-07-19 1927-07-19 Improvements in telephone systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB19184/27A Expired GB274518A (en) 1926-07-19 1927-07-19 Improvements in telephone systems

Country Status (1)

Country Link
GB (2) GB274518A (en)

Also Published As

Publication number Publication date
GB274518A (en) 1928-10-19

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