When I use AGI's Record File with DTMF termination, you can hear a snippet of DTMF at the end of the message. Actually, you hear DTMF at the beginning too, but I work around that by streaming from a few hundred milliseconds into the file. However, I haven't been able to come up with a way around hearing it at the end, and the customer is complaining. If there's no workaround, I'll file a bug report. You can hear an example of this on +1 619 364 0221. Thanks.