Review on 8CH DTMF Relay Phone Voice Signal Decoder Module, AD22A08 DC 12V Remote Controller Switch by Butros Allen

Name: 8CH DTMF Relay Phone Voice Signal Decoder Module, AD22A08 DC 12V Remote Controller Switch
Item: 8CH DTMF Relay Phone Voice Signal Decoder Module, AD22A08 DC 12V Remote Controller Switch
Rating: 5

July 13, 2023

Good quality DTMF converter.

I bought a couple of these boards to add Touch-Tone capability to a 1978 OKI Electric AC125A Crossbar PBX. They work great. Documentation can be found online with a little searching.

Pros

DTMF from phone or hand held radio work very good

Cons

The 8CH DTMF Relay Phone Voice Signal Decoder Module comes with a complex wiring system that may seem daunting for inexperienced professionals

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