Device for recovery of clock frequency in digital transmission

Device for remote monitoring, managing and piloting a...

Device for switching signals by optical means and switching...

Device for the control of data flows

Device for the detection of signals in continuous current...

Device for the interconnection of mobile phones and analog...

Device for the operation of appliances, utilities and...

Device for transmitting and processing data, or for...

Device for transmitting coded messages between stations

Device for upgrading a reporting system

Device related to a private exchange

Dial and multifrequency telephone system employing ringing...

Dial pulse and multiple frequency signalling sender/multiple...

Dial pulse correcting circuit

Dial pulse correction circuit for telephone signaling system

Dial pulse detection circuit

Dial pulse detection method and apparatus

Dial pulse incoming trunk and register arrangement

Dial pulse receiver

Dial pulse register circuit