[Asterisk-Dev] dtmf detection on zap/n-2 channel

[Leandro]

Hi,
I have a bunch of analog phones (standard italian telco provided phones, Telecom Sirio.187) where asterisk fails to detect the dtmf signal when performing a dial on a threeway call. If I directly dial, all dtmf digits are readed correctly, but if I press the flash-hook button and then dial another extension, no dtmf is detected. With other analog phones, all is ok.

Is there a way to read what frequencies asterisk receives when I press a key on the phone?

Thank you

Leandro
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