GB517993A - Improvements in or relating to identification of subscribers in telecommunication exchange systems - Google Patents

Improvements in or relating to identification of subscribers in telecommunication exchange systems

Info

Publication number
GB517993A
GB517993A GB23923/38A GB2392338A GB517993A GB 517993 A GB517993 A GB 517993A GB 23923/38 A GB23923/38 A GB 23923/38A GB 2392338 A GB2392338 A GB 2392338A GB 517993 A GB517993 A GB 517993A
Authority
GB
United Kingdom
Prior art keywords
circuit
over
tandem
junction
group
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
GB23923/38A
Other languages
English (en)
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
Application filed by Individual filed Critical Individual
Publication of GB517993A publication Critical patent/GB517993A/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)
  • Interface Circuits In Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
GB23923/38A 1938-08-13 1938-08-13 Improvements in or relating to identification of subscribers in telecommunication exchange systems Expired GB517993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB234895X 1938-08-13

Publications (1)

Publication Number Publication Date
GB517993A true GB517993A (en) 1940-02-14

Family

ID=10196442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23923/38A Expired GB517993A (en) 1938-08-13 1938-08-13 Improvements in or relating to identification of subscribers in telecommunication exchange systems

Country Status (6)

Country Link
BE (1) BE435678A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH234895A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE892463C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR858506A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB517993A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL54464C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1705917A (en) * 1925-02-19 1929-03-19 Toll-service telephone-exchange system
DE635669C (de) * 1932-11-01 1936-09-28 Friedrich Merk Telefonbau Akt Einrichtung zur Feststellung der Nummer eines anrufenden Teilnehmers in Selbstanschlussverbindungssystemen
US2193967A (en) * 1933-01-05 1940-03-19 Teletype Corp Automatic message exchange system

Also Published As

Publication number Publication date
NL54464C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH234895A (de) 1944-10-31
DE892463C (de) 1953-10-08
FR858506A (fr) 1940-11-27
BE435678A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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