Your operator is likely talking about the DTMF 'method' (inband, SIP INFO, rfc2833), not encryption. In which case yoi are probably set up to do that already. Post a console log of a sample call on pastebin.freeswitch.org if yiu want is to confirm, and reply to this thread with a link.

- BDF

On May 29, 2013 9:45 AM, "afshin afzali" <a.afzali2003@gmail.com> wrote:
Hi Mike,

Actually I'm not. This is a request from my local operator. As you said I told them that is possible to encrypt entire rtp stream by SRTP / ZRTP techniques. She says me that (on Huawei Switch) the encryption option just there when she selects rfc2833 for digit handling and not on entire media stream !!!
Thank you so much,

Afshin


On Wed, May 29, 2013 at 4:44 PM, Michael Jerris <mike@jerris.com> wrote:
We support SRTP, which encrypts the entire media stream including the 2833 digits.  I'm not familiar with a standard that just encrypts the dtmf.  Did they provide any details of what this standard is?

Mike

On May 29, 2013, at 5:14 AM, afshin afzali <a.afzali2003@gmail.com> wrote:

> Hi Guys,
>
> I don't know if FreeSWITCH is capable of to exchange encrypted rfc2833 dtmf digits. My voip provider uses a Huawei switch and does ask me to enable dtmf encryption but I could not find such parameter in sofia.xml.conf file.
>


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_________________________________________________________________________
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http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
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