GB974236A - Improvements relating to automatic telephone exchange systems - Google Patents

Improvements relating to automatic telephone exchange systems

Info

Publication number
GB974236A
GB974236A GB3207262A GB3207262A GB974236A GB 974236 A GB974236 A GB 974236A GB 3207262 A GB3207262 A GB 3207262A GB 3207262 A GB3207262 A GB 3207262A GB 974236 A GB974236 A GB 974236A
Authority
GB
United Kingdom
Prior art keywords
line
group
marking
pbx
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
GB3207262A
Inventor
Douglas Percy Long
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 Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3207262A priority Critical patent/GB974236A/en
Publication of GB974236A publication Critical patent/GB974236A/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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

974,236. Automatic exchange systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. July 15, 1963 [Aug. 21, 1962], No. 32072/62. Heading H4K. A PBX final selector FSR of the uniselector type having an associated common control circuit CCC with tens and units switches DA1 DB1 is further controlled by a marker CMC which is common to a number of such control circuits and which, when the dialled number represents a PBX group, marks all the lines of that group, but, when the number is that of an individual line or a night service line of a PBX group, marks only that line. As shown, when a PBX group is called, the marking applied to the first line such as MW/43 is extended over rectifiers such as MR2, MR3 to all the other lines of the group. If, however, a night service line such as MW/70, MW/98 is called the rectifiers prevent the extension of the marking. In another arrangement, Figs. 2a, 2b, 2c (not shown), the marking on the first line energizes a relay which extends the marking. The marker CMC is seized, provided it is idle, by rest relay MT which operates by condenser-discharge under the control of a pulsing relay FT (not shown).
GB3207262A 1962-08-21 1962-08-21 Improvements relating to automatic telephone exchange systems Expired GB974236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3207262A GB974236A (en) 1962-08-21 1962-08-21 Improvements relating to automatic telephone exchange systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3207262A GB974236A (en) 1962-08-21 1962-08-21 Improvements relating to automatic telephone exchange systems

Publications (1)

Publication Number Publication Date
GB974236A true GB974236A (en) 1964-11-04

Family

ID=10332762

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3207262A Expired GB974236A (en) 1962-08-21 1962-08-21 Improvements relating to automatic telephone exchange systems

Country Status (1)

Country Link
GB (1) GB974236A (en)

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