GB1058540A - Circuit arrangement for selecting a wanted line in a telecommunication exchange - Google Patents

Circuit arrangement for selecting a wanted line in a telecommunication exchange

Info

Publication number
GB1058540A
GB1058540A GB45864/65A GB4586465A GB1058540A GB 1058540 A GB1058540 A GB 1058540A GB 45864/65 A GB45864/65 A GB 45864/65A GB 4586465 A GB4586465 A GB 4586465A GB 1058540 A GB1058540 A GB 1058540A
Authority
GB
United Kingdom
Prior art keywords
relays
selecting
circuit arrangement
substation
pairs
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
GB45864/65A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1058540A publication Critical patent/GB1058540A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Abstract

1,058,540. Automatic exchange systems. INTERNATIONAL STANDARD ELECTRIC CORPORATION. Oct. 29, 1965 [Nov. 4, 1964], No. 45864/65. Heading H4K. In an arrangement for sending numbers from a substation, AC, e.g. of commercial frequency, is fed from the exchange to the line wires through two pairs A, B; C, D of polarized relays and two pairs of keys 1T . . . 4T at the substation are operable to connect oppositelypoled rectifiers GL1, GL2 to the line wires to control the relays selectively. Two keys need to be actuated in succession, or the same key twice, in order to establish a speech path over one of the routes at the right-hand side of the Figure, relays being provided to ensure the proper sequence of operations.
GB45864/65A 1964-11-04 1965-10-29 Circuit arrangement for selecting a wanted line in a telecommunication exchange Expired GB1058540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT932764A AT245055B (en) 1964-11-04 1964-11-04 Circuit arrangement for dialing a conversation partner by means of dialing keys

Publications (1)

Publication Number Publication Date
GB1058540A true GB1058540A (en) 1967-02-15

Family

ID=3613179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45864/65A Expired GB1058540A (en) 1964-11-04 1965-10-29 Circuit arrangement for selecting a wanted line in a telecommunication exchange

Country Status (4)

Country Link
US (1) US3487171A (en)
AT (1) AT245055B (en)
DE (1) DE1283923B (en)
GB (1) GB1058540A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1290723A (en) * 1969-10-02 1972-09-27
DE2852488C2 (en) * 1978-12-05 1982-05-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for evaluating coded direct current push-button dialing codes in telephone systems with subscriber connection lines of different lengths

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278410A (en) * 1940-10-08 1942-04-07 Bell Telephone Labor Inc Telephone system
US2400148A (en) * 1943-06-23 1946-05-14 Bell Telephone Labor Inc Telephone call transmitting device
US3328533A (en) * 1964-06-18 1967-06-27 Columbia Ribbon & Carbon Direct key calling telephone station having binary converting means

Also Published As

Publication number Publication date
DE1283923B (en) 1968-11-28
US3487171A (en) 1969-12-30
AT245055B (en) 1966-02-10

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