GB264236A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB264236A
GB264236A GB2572825A GB2572825A GB264236A GB 264236 A GB264236 A GB 264236A GB 2572825 A GB2572825 A GB 2572825A GB 2572825 A GB2572825 A GB 2572825A GB 264236 A GB264236 A GB 264236A
Authority
GB
United Kingdom
Prior art keywords
check
tone
trunk
line
sleeve
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
GB2572825A
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.)
Individual
Original Assignee
Individual
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
Priority to NL20919D priority Critical patent/NL20919C/xx
Priority to BE336187D priority patent/BE336187A/xx
Application filed by Individual filed Critical Individual
Priority to GB2572825A priority patent/GB264236A/en
Priority to FR620949D priority patent/FR620949A/en
Publication of GB264236A publication Critical patent/GB264236A/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
    • H04M15/08—Metering calls to called party, i.e. B-party charged for the communication

Landscapes

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

Abstract

264,236. Standard Telephones & Cables, Ltd., (formerly Western Electric Co., Ltd.), and Deakin, G. Oct. 14, 1925. Automatic and semi-automatic exchange systems.-In a system employing two-wire trunk lines a toll operator at the position S is enabled to check the identity of a calling line requiring toll service by means of a check trunk CC over which she gives the number to a switching operator who plugs into the corresponding line jack at the position M. The toll operator also causes an auxiliary trunk JSC to be associated with the trunk WJC over which the calling line reached her by sending impulses thereover from her dial D to control a single co-ordinate switch JS. A circuit is thereby completed from the checking tone transformer CTT over the test circuits of the automatic switches through condensers C1, C2, C3, as shown in Figs. 1, 2, and a tone is heard by both operators. In Fig. 1, the sleeve circuit of the first line of a P.B.X. group is connected through condensers such as CS1, CS2 to the sleeve circuits of the remainder, so that the check tone may be always picked up on the sleeve of the first jack. In Fig. 2, in the case of a P.B.X. line, it is necessary for the switching operator to test the corresponding jacks successively until the check tone is picked up. Specifications 204,176 and 221,869 are referred to.
GB2572825A 1925-10-14 1925-10-14 Improvements in telephone systems Expired GB264236A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL20919D NL20919C (en) 1925-10-14
BE336187D BE336187A (en) 1925-10-14
GB2572825A GB264236A (en) 1925-10-14 1925-10-14 Improvements in telephone systems
FR620949D FR620949A (en) 1925-10-14 1926-09-01 Improvements to telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2572825A GB264236A (en) 1925-10-14 1925-10-14 Improvements in telephone systems

Publications (1)

Publication Number Publication Date
GB264236A true GB264236A (en) 1927-01-14

Family

ID=10232319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2572825A Expired GB264236A (en) 1925-10-14 1925-10-14 Improvements in telephone systems

Country Status (4)

Country Link
BE (1) BE336187A (en)
FR (1) FR620949A (en)
GB (1) GB264236A (en)
NL (1) NL20919C (en)

Also Published As

Publication number Publication date
NL20919C (en)
FR620949A (en) 1927-05-02
BE336187A (en)

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