asterisk users - May 2005 - Asterisk Guru help needed for DISA troubles

I have a setup which allows users to access my asterisk box via FWD.  
That is, a user in say, France can call into a local access number for 
FWD, then hit number 7 which dumps them into a DISA request for a 
password, which then dumps them into my internal extension so they can 
dial out through a VOIP provider.  Everything works fine until they 
enter their tones for the number they are calling -- DISA does not 
respond, just sits there twiddling its thumbs.  The strange thing is 
that it works fine when a caller direct dials into my Asterisk box then 
they can access the internal extension and dail outward.  So, I'm 
presuming this has something to do with codecs being passed from the FWD 
server(s).  For FWD I have (in addition to other settings):

disallow=all
allow=ulaw
allow=alaw
allow=gsm
allow=ilbc
dtmfmode=inband

and for the VOIP provider for calling out I have

disallow=all
allow=ulaw
allow=alaw
allow=gsm
allow=ilbc
dtmfmode=inband
dtmfmode=inband

Why would Asterisk understand the tone for transfering to the DISA 
extension, but stall with any subsequent tones, yet work 100% for a 
direct dial inward call?

I'm perplexed.

Thanks for any insights a guru could provide.

B.

On May 14, 2005 11:58 pm, Jeffrey Starin wrote:
> disallow=all
> allow=ulaw
> allow=alaw
> allow=gsm
> allow=ilbc
> dtmfmode=inband
It doesn't take a guru.  :-)

you can't use inband signaling if you are allowing the possibility of 
compressed codecs such as gsm and ilbc.  Use RFC2833.

-A.

Wilson Pickett wrote:
>>Any other suggestions?
>>    
>>
>
>Have you tried limiting it to ulaw for a test? FWD does ulaw ONLY anyway.
>_______________________________________________
>  
>
A good question would be, are you using FWD with SIP or IAX? Anyway I am 
using one FWD IAX to access an IVR that allow callers to choose which 
extension they want and that works fine. I am also using another FWD 
with SIP that allows the caller to access MeetMe and the meetme requires 
a PIN and that works fine also. I did have a problem, when 
DtmfMode=Inband, so I just deleted this and it all works fine. What is 
the default? I have no idea, but it works great without it.

ulaw only applies to IAX channels, not SIP.

Regards
Garry Taylor
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