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(en)
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Electronic switching network
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(en)
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Telephone routing system
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SE178299C1
(enExample)
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SE451169B
(sv)
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Ledningsstyrkrets for en tyristorstromriktare
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(en)
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Testing and selecting system
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(en)
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Selecting system
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(en)
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Automatic telecommunication switching systems
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(en)
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Selecting and two-way translating system
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(en)
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Electronically controlled glass reed switching network
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(en)
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Signaling system
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(en)
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Relay allotter for finder switches
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(en)
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Telephone system
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(en)
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Automatic telecommunication exchanges
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(en)
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Static switching arrangements of the cross-point type
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(en)
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Communication switching system
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(en)
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Signaling system
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(en)
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Controls for a glass crosspoint arrangement
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(en)
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Telecommunication coordinate relay switching systems having auxiliary holding means
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(en)
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Selective system
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(en)
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Telephone system
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(en)
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Trunk-testing circuits for selector switches
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(en)
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Marking circuit
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US1541386A
(en)
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Machine-switching telephone-exchange system
|
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(en)
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Idle test unit
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US2338642A
(en)
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Testing and signaling system
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