FR954791A - - Google Patents

Info

Publication number
FR954791A
FR954791A FR954791DA FR954791A FR 954791 A FR954791 A FR 954791A FR 954791D A FR954791D A FR 954791DA FR 954791 A FR954791 A FR 954791A
Authority
FR
France
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)
Publication date
Application granted granted Critical
Publication of FR954791A publication Critical patent/FR954791A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR954791D Expired FR954791A (zh)

Publications (1)

Publication Number Publication Date
FR954791A true FR954791A (zh) 1950-01-05

Family

ID=1557629

Family Applications (1)

Application Number Title Priority Date Filing Date
FR954791D Expired FR954791A (zh)

Country Status (1)

Country Link
FR (1) FR954791A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0491473A2 (en) * 1990-12-18 1992-06-24 Sangara Industrial Co. Ltd. Control circuit for an electrical telephone accessory

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0491473A2 (en) * 1990-12-18 1992-06-24 Sangara Industrial Co. Ltd. Control circuit for an electrical telephone accessory
EP0491473A3 (en) * 1990-12-18 1992-12-09 Sangara Industrial Co. Ltd. Control circuit for an electrical telephone accessory

Similar Documents

Publication Publication Date Title
BE522897A (zh)
FR954699A (zh)
FR955401A (zh)
FR955216A (zh)
FR954841A (zh)
FR954791A (zh)
FR955433A (zh)
BE495415A (zh)
BE495255A (zh)
BE465350A (zh)
BE507937A (zh)
BE461301A (zh)
BE502621A (zh)
BE500448A (zh)
BE495522A (zh)
BE495516A (zh)
BE495514A (zh)
BE495504A (zh)
BE495485A (zh)
BE495456A (zh)
BE495443A (zh)
BE495440A (zh)
BE495435A (zh)
BE494893A (zh)
BE495391A (zh)