asterisk users - Feb 2008 - More on Broadvoice w/Asterisk (1.4.18)

Hi folks,

I'm running Asterisk 1.4.18 on Mac OS X.  I'm using Broadvoice to 
connect external numbers with this system.  So, what I'm dealing with 
here are inbound calls.

The problem is that I'm not able to get DTMF in.  I am behind NAT, but 
I've made sure that the IT folks here have opened and port-forwarded all 
the necessary ports.  This is borne out by the fact that I can see 
RTP/RTCP packets (using packet sniffer) and get audio in as well. 
However, no DTMF.

I've tried resetting the dtmf mode from inband to rfc2833 as well as 
auto (per Broadvoice tech's suggestions), I've tried setting 
sip.broadband.com to all the different proxy IPs as suggested here:

http://lists.digium.com/pipermail/asterisk-users/2005-December/132327.html

I've also tried moving the dtmfmode=rfc2833 to the general context in 
sip.conf.  Here's the current sip.conf configuration:


[general]
context=default
allowoverlap=no
bindport=5060
bindaddr=0.0.0.0
srvlookup=yes

pedantic=no

;dtmfmode=rfc2833

register => 
2125551212 at sip.broadvoice.com:lePassword:2125551212 at sip.broadvoice.com

externip=199.171.51.236
localnet=10.91.180.36/255.255.255.0
nat=yes

[authentication]

[1000]
type=friend
context=phones
host=dynamic

[sip.broadvoice.com]
type=peer
user=phone
host=sip.broadvoice.com
fromdomain=sip.broadvoice.com
fromuser=2125551212
secret=lePassword
username=2125551212
context=default
;context=from-broadvoice
authname=2125551212
allow=ulaw
allow=alaw

;dtmfmode=rfc2833
dtmf=inband

;Disable canreinvite if you are behind a NAT
canreinvite=no

insecure=very



I'm completely at a loss at this point.  I'm not sure if it is my 
problem or Broadvoice's problem, but I'm considering trying another 
provider--just to see if that's the problem!

Any help will be greatly appreciated--

Thanks,
Dave D.