You will have to look at the full negotiation of that leg and a debug log to see what's going on.

On Thursday, August 13, 2015, Jurijs Ivolga <jurij.ivo@gmail.com> wrote:

Hi,

I'm struggling with quite simple issue. I need to enable SRTP on outbound leg. Call hits Freeswitch as SRTP but it leaves as regular RTP. I do not use TLS and I don't need it(yes, I know that SRTP keys are sent as plain text in this case).

I tried to add following code to my dialplan, but it do not helps:
<condition field="${sip_has_crypto}" expression="^(AES_CM_128_HMAC_SHA1_32|AES_CM_128_HMAC_SHA1_80)$" break="never">
       <action application="set" data="sip_secure_media=true"/>
       <action application="export" data="sip_secure_media=true"/>
</condition>
I tried to add to vars.xml following line too:

<X-PRE-PROCESS cmd="set" data="rtp_secure_media_inbound=mandatory"/>
But still without success.
Maybe somebody can give me a hint?
Thank you!
With kind regards,
Jurijs