Paul Hewlett wrote:
There was a discusson on this list - something about DTMF settings when not
using alaw/ulaw having to be 'inband' and not 2833 or SIP INFO ?
I think you have gotten it backwards. You need RFC-2833 or SIP-INFO if
not using alaw/ulaw. Most compression will remove certain frequencies
from the signal. As a result there may not be enough spectral energy
left to allow the DTMF detector to work correctly.
Leo.
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