Those phones probably do not support it, I'm unaware of any endpoints currently other than freeswitch that can do big AES.

On Thu, Jan 29, 2015 at 1:53 AM, Melanie Treitinger <treitinger@as-infodienste.de> wrote:
I'm using Version 1.5.15b git d199060 2015-01-09 00:01:19Z 32bit

Endpoints are Innovaphone IP810 telephone system, registered as gateway,
and Innovaphone IP241 phone wich is calling e.g. Tetris via this gateway.

In my dialplan I have set <action application="export"
data="rtp_secure_media=mandatory:AES_CM_128_HMAC_SHA1_80,AES_CM_128_HMAC_SHA1_32"/>
With AES128, I can hear Tetris.

When I change this to "AES_CM_256_HMAC_SHA1_80", which I would prefer, I
hear nothing.

In the file mime.types I see only "audio/rtp-enc-aescm128".

Do you need more information?


Am 28.01.2015 um 17:01 schrieb Brian West:
> Yes, First off what revision of FreeSWITCH are you using? And what
> endpoints are you working with?
>
> On Wed, Jan 28, 2015 at 9:55 AM, Melanie Treitinger
> <treitinger@as-infodienste.de <mailto:treitinger@as-infodienste.de>> wrote:
>
>     Hi, I'm trying to make sip calls with encryption.
>     Everything works fine with AES 128, but with AES 256 there is no audio
>     but also no error reported.
>
>     How do I use AES 256? Is it implemented in FreeSWITCH already?
>
>     Thanks
>     Melanie
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