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.)
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens CorpfiledCriticalSiemens and Halske AG
Application grantedgrantedCritical
Publication of FR659711ApublicationCriticalpatent/FR659711A/fr
H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04Q—SELECTING
H04Q1/00—Details of selecting apparatus or arrangements
H04Q1/18—Electrical details
H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
H04Q1/22—Automatic arrangements
H04Q1/26—Automatic arrangements for signalling trouble in unoccupied sub-exchanges
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Engineering & Computer Science
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Computer Networks & Wireless Communication
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Physics & Mathematics
(AREA)
Astronomy & Astrophysics
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General Physics & Mathematics
(AREA)
FR659711D1927-07-021928-06-26Disposition de connexion pour installations téléphoniques avec bureaux intermédiaires principaux et secondaires
ExpiredFR659711A
(fr)
Disposition de couplage pour installations téléphoniques avec plusieurs bureaux intermédiaires et avec service par sélecteurs, notamment pour installations à bureaux secondaires
Disposition de couplage pour installations téléphoniques avec bureaux intermédiaires principaux et avec bureaux intermédiaires secondaires équipés pour un service pr sélecteurs