We started with dtmf threshold at 100 then we lowered it at 80 since DTMF incoming from our VoIP provider (voip.eutelia.it) was not recognized then we lowered it again to 50 since DTMF originated by another PBX with a TDM400P (4FXO) was not recognized.

With 50 is almost fine we had a problem recentrly with some mobile phones, we cannot recognized DTMF from:
* Nokia N70
* Sony Ericson W600

I've tried lowering the threshold to 40, 30, 20 and lately 10 without any success.
How can i debug this?

Antonio Gallo


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