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US4232198A
(en)
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Device for establishing conference calls via at least one telephone exchange switching system
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CH395200A
(fr)
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Installation de sélection d'un central de télécommunication automatique
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BE536895A
(enrdf_load_stackoverflow)
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US1568039A
(en)
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Telephone-exchange system
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CH389034A
(fr)
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Dispositif de concentration de lignes téléphoniques
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US3532829A
(en)
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Priority traffic control apparatus for preferential access to common control equipment
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US2996582A
(en)
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Discriminating trunk circuit
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US4169221A
(en)
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Method and apparatus for testing a subscriber line group marker of a telephone central office cross bar switching device
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BE481276A
(enrdf_load_stackoverflow)
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BE476206A
(enrdf_load_stackoverflow)
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BE415527A
(enrdf_load_stackoverflow)
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BE488676A
(enrdf_load_stackoverflow)
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BE482829A
(enrdf_load_stackoverflow)
|
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BE374766A
(enrdf_load_stackoverflow)
|
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BE503645A
(enrdf_load_stackoverflow)
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BE372322A
(enrdf_load_stackoverflow)
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CH284632A
(fr)
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Bureau central automatique pour installation de télécommunication.
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BE432949A
(enrdf_load_stackoverflow)
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BE431601A
(enrdf_load_stackoverflow)
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BE657120A
(enrdf_load_stackoverflow)
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BE372105A
(enrdf_load_stackoverflow)
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BE428087A
(enrdf_load_stackoverflow)
|
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JPS6231541B1
(enrdf_load_stackoverflow)
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BE351277A
(enrdf_load_stackoverflow)
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BE393936A
(enrdf_load_stackoverflow)
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