[asterisk-dev] Can Asterisk detect A,B,C,D DTMF signals

[Nir Simionovich]

Hi All,

I've been asked by a prospect if Asterisk can handle the additional DTMF
signals that
may be produced by some emergency systems. According to the DTMF standard,
there are 4 additional tones that can be generated, however, these are not
used in most
phones.

Can these be intercepted by Asterisk?

Nir Simionovich
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