Asterisk with SFLphone soft phone
The following is the configuration I have working with Sflphone 0.6.2
sip.conf:
[d7]
type=friend
context=demo ; Where to start in the dialplan when this phone calls
callerid=d7
host=dynamic
secret=blah
dtmfmode=info ; either RFC2833 or INFO for the BudgeTone
HTH
Sflphone
Sflphone has very good SIP INFO DTMF support.
You should configure Sflphone as follows:
Setup ->SIP Authentication
User address: Your SIP Address sip: <username>@<server>.
Authorization user : user
Your password: yourpassword.
SIP Proxy : your server IP
Auto-Register works.