His DTMF decoder box uses a CM8870 DTMF decoder chip, which you might assume is all you need to get the job done. This chip performs its duties very well, ...

The CMX867A's “high-quality” DTMF decoder, for industrial control and security systems, telephone telemetry and advanced payphones offer high immunity to falsing on voice. A high-speed serial bus, ...

Hence he’s taken a commodity joypad and interfaced a MT8870 DTMF decoder to its switch lines with a simple transistor buffer, and is able to pull the resulting information out in the host ...

Cimarron Technologies Corp.'s C Plus II Display/Decoder has a single window display with a review of last 20 messages. ... MDC-1200, FleetSync, or DTMF compatible.