England — CML's CMX865A DTMF is a multi-standard modem for use in wireless local loop, short message service telephone-based information and telemetry systems. Flexible line driver, hybrid and ...

Flexible line driver, hybrid and receiver circuits are integrated on-chip, requiring only passive components to build a 2 or 4-wire line interface. A high-quality DTMF decoder offers excellent ...

When a DTMF tone is received, a NodeMCU connected to the decoder calls an IFTTT job to echo the key to [WTH]’s phone as an SMS message. That makes it easy to drive around and test whether his ...