GB371358A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB371358A
GB371358A GB30588/31A GB3058831A GB371358A GB 371358 A GB371358 A GB 371358A GB 30588/31 A GB30588/31 A GB 30588/31A GB 3058831 A GB3058831 A GB 3058831A GB 371358 A GB371358 A GB 371358A
Authority
GB
United Kingdom
Prior art keywords
test
automatic
test relay
common equipment
final selector
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
GB30588/31A
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.)
AUTOMATIC ELECTRIC CO Ltd
Original Assignee
AUTOMATIC ELECTRIC CO 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 AUTOMATIC ELECTRIC CO Ltd filed Critical AUTOMATIC ELECTRIC CO Ltd
Publication of GB371358A publication Critical patent/GB371358A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Radio Relay Systems (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

371,358. Automatic exchange systems. AUTOMATIC ELECTRIC CO., Ltd., (formerly AUTOMATIC TELEPHONE MANUFACTURING CO., Ltd.), Strowger Works, and TAYLOR, R., 30, Oulton Road, Wavertree, both in Liverpool. Jan. 19, 1931, No. 30588. Divided on 371,355. Drawings to Specification. [Class 40 (iv).] In a final selector, a metal rectifier is interposed between the test relay and the test wiper, or alternatively a polarized test relay is employed, in order to avoid false operation by booster metering battery on the test terminal. The invention is described with reference to the final selector controlled by multipled common equipment described in Specification 371,355, the test relay being in the common equipment.
GB30588/31A 1931-01-19 1931-01-19 Improvements in or relating to telephone systems Expired GB371358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1804/31A GB371355A (en) 1931-01-19 1931-01-19 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB371358A true GB371358A (en) 1932-04-19

Family

ID=9728287

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1804/31A Expired GB371355A (en) 1931-01-19 1931-01-19 Improvements in or relating to telephone systems
GB30588/31A Expired GB371358A (en) 1931-01-19 1931-01-19 Improvements in or relating to telephone systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1804/31A Expired GB371355A (en) 1931-01-19 1931-01-19 Improvements in or relating to telephone systems

Country Status (3)

Country Link
US (1) US1954106A (en)
FR (1) FR730132A (en)
GB (2) GB371355A (en)

Also Published As

Publication number Publication date
GB371355A (en) 1932-04-19
US1954106A (en) 1934-04-10
FR730132A (en) 1932-08-06

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