[Asterisk-Users] Problem with asterisk 1.0.9 and sip and dtmf

[Mike Bernson]

I have asterisk running with sipura 3000 connect to PSTN and
sipura 2000 connected to phones.

On inbound calls I am getting what sounds like DTMF tone when
someone is talking on the PSTN side of the phone. It sound like
someone is hitting key on the phone while talking.

Is there any way to stop this from happing.

Here is the PSTN and one ext from the sip.conf

PSTN line
[199]
username=xxxx
type=friend
secret=xxxx
record_out=Adhoc
record_in=Adhoc
qualify=yes
port=5061
nat=never
mailbox=199 at device
host=dynamic
dtmfmode=rfc2833
context=incomming
canreinvite=no

ext
[206]
username=xxxx
type=friend
secret=xxxx
record_out=Adhoc
record_in=Adhoc
qualify=yes
port=5061
nat=never
mailbox=206 at device
host=dynamic
dtmfmode=rfc2833
context=from-sip
canreinvite=no