[asterisk-users] inband DTMF for g729

[Gary Chen]

----- Original Message ----- 
From: "Darrick Hartman (lists)" <dhartman at djhsolutions.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
Sent: Sunday, June 24, 2007 11:25 AM
Subject: Re: [asterisk-users] inband DTMF for g729


> Gang Chen wrote:
>>> On 6/22/07, Gary Chen <gang.chen at insightbb.com> wrote:
>>>> We are using Level 3. At this point, changing carrier is not an option.
>>>>
>>> Gary,
>>>
>>>  I use Level(3) with G729a and RFC2833.  No problems, no requirement
>>> for inband G729.
>>> -- 
>>> Kristian Kielhofner
>>>
>>
>> I can connect to Asterisk IVR using a SIP phone and send RFC2833 with 
>> g729.
>> It works fine. But when test call from PSTN to Asterisk, if I set 
>> dtmf=auto
>> with g729, I got warning saying something like  * does not support inband
>> for g729 and sutomaticlly switch to rfc2833.  If I set dtmf=g729, there 
>> is
>> no warning but I have the same problem. This tells me that Level3 does 
>> use
>> inband for g729 or maybe I am doing something wrong .
>>
>> Gary
>
> Gary,
>
> I'll restate what Kristian just said above.  You do NOT need inband for
> Level 3.  Set dtmf=RFC2833.
>
> Do you have the correct g729 codec licenses installed?  This may be more
> of a transcoding issue than anything else.
>
> Darrick
> -- 
> Darrick Hartman
> DJH Solutions, LLC
> http://www.djhsolutions.com
>
We  have not yet purchase the g729 codec licenses. I want to test it out 
first before we buy any license. I download g729 from Internet.  I did set 
dtmfmode=rfc2833. It worked if I use an SIP phone connect to Asterisk using 
g729 and send dtmf tone using rfc2833. But not from PSTN through Level 3 .

Gary