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Centrally controlled switching networks
Computer for controlling switching networks
Control system for telephone signalling transmission
Selective access device for centralized telephone switching...
Telephone apparatus with a fixed telephone station coupled...
Centrally controlled switching networks
Computer for controlling switching networks
Control system for telephone signalling transmission
Selective access device for centralized telephone switching...
Telephone apparatus with a fixed telephone station coupled...
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Profile ID: LFCA-PAI-P-25076