<div>We experienced this problem with a Sangoma A104D card. With echo cancel turned on, the card was not detecting incoming DTMF digits to our IVR properly. However, when we added the line relaxdtmf=yes to zapata.conf, the problem went away. If the relaxdtmf setting is not curing the problem for you, I would suggest sending an email to
<a href="mailto:support@sangoma.com">support@sangoma.com</a>.</div>
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<div>Rana Dutt</div>
<div>Softel Solutions</div>
<div>rdutt at softelinc dot com</div>
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