DTMF tones not working

Hi.
I built an allstar node with a pi3 and cm108.
The DTMF tones are not registering at all.
I have tested the rx level, it is fine. I have played with pre and de emphasis but still not working.

I’m new to this, it is a new node that works well in every other way…

Thanks for any help
Ben

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FYI, by trying another radio, I worked out the fault was with the tones being transmitted by a cheap Baofeng…

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