GB295451A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB295451A
GB295451A GB431528A GB431528A GB295451A GB 295451 A GB295451 A GB 295451A GB 431528 A GB431528 A GB 431528A GB 431528 A GB431528 A GB 431528A GB 295451 A GB295451 A GB 295451A
Authority
GB
United Kingdom
Prior art keywords
switch
switches
testing apparatus
busy
marking
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
GB431528A
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
Priority to GB431528A priority Critical patent/GB295451A/en
Publication of GB295451A publication Critical patent/GB295451A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
    • H04Q1/22—Automatic arrangements
    • H04Q1/24—Automatic arrangements for connection devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

295,451. Standard Telephones & Cables, Ltd., Wright, E. P. G., Baker, J. H. E., and Cameron, A. K. May 10, 1927. Divided on 295,421. Drawings to Specification. Automatic exchange systems.-Routine testing apparatus for marking switches which control single-motion conversational switches first puts each of the marking switches in turn through a series of operations simulating an ordinary call and then makes a more rapid test as to the condition of the test circuit of each switch. When the testing apparatus engages a busy switch, it waits until the switch becomes idle or, if the busy condition persists for mcre than a predetermined time, gives an alarm. The invention is described with reference to an arrangement which is identical with part of the system described in Specification 295,421.
GB431528A 1927-05-10 1927-05-10 Improvements in telephone systems Expired GB295451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB431528A GB295451A (en) 1927-05-10 1927-05-10 Improvements in telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB431528A GB295451A (en) 1927-05-10 1927-05-10 Improvements in telephone systems

Publications (1)

Publication Number Publication Date
GB295451A true GB295451A (en) 1928-08-10

Family

ID=9774842

Family Applications (1)

Application Number Title Priority Date Filing Date
GB431528A Expired GB295451A (en) 1927-05-10 1927-05-10 Improvements in telephone systems

Country Status (1)

Country Link
GB (1) GB295451A (en)

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