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FR594113A - Systems for telephone exchanges - Google Patents

Systems for telephone exchanges

Info

Publication number
FR594113A
FR594113A FR594113DA FR594113A FR 594113 A FR594113 A FR 594113A FR 594113D A FR594113D A FR 594113DA FR 594113 A FR594113 A FR 594113A
Authority
FR
France
Prior art keywords
systems
telephone exchanges
exchanges
telephone
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
Other languages
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR594113A publication Critical patent/FR594113A/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
    • H04M15/04—Recording calls, or communications in printed, perforated or other permanent form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR594113D 1925-02-19 1925-02-19 Systems for telephone exchanges Expired FR594113A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR594113T 1925-02-19

Publications (1)

Publication Number Publication Date
FR594113A true FR594113A (en) 1925-09-07

Family

ID=8965934

Family Applications (1)

Application Number Title Priority Date Filing Date
FR594113D Expired FR594113A (en) 1925-02-19 1925-02-19 Systems for telephone exchanges

Country Status (2)

Country Link
US (1) US1705917A (en)
FR (1) FR594113A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE892463C (en) * 1938-08-13 1953-10-08 Int Standard Electric Corp Circuit arrangement for determining the number of a calling subscriber in telephone systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE892463C (en) * 1938-08-13 1953-10-08 Int Standard Electric Corp Circuit arrangement for determining the number of a calling subscriber in telephone systems

Also Published As

Publication number Publication date
US1705917A (en) 1929-03-19

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