On 21 Jun 2007 at 23:39, Nate Duehr wrote:

> 
> Sure, DSP-based solutions can match or better it, but for ease of  
> use, the 8870 is hard to beat in a discreet component.
> 
> I've seen the 8870 pull DTMF out of noisy FM radio signals that were  
> well below the pseudo-industry-standard 12 dB SINAD "noisy signal"  
> level.
> 

	I couldn't get them to work ok decoding DTMF from CDMA cell phones.
	Had to switch to an Atmel AVR running Goertzel algorithm.
	It solved the problem.

	Mark Jordan

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