Technically you dont even need --enable-zrtp if you just want end to end ZRTP and requires you to have a client that has the zrtp-hash in the sdp and 200ok from the far side.  Otherwise Trusted MiTM gets in the way.  If either end isn't enrolled the SAS will not match.

/b

On Jul 19, 2012, at 9:01 AM, Finn Höck wrote:

Hi,
I got freeswitch working perfectly on CentOS 6.3 by following the guide on http://wiki.freeswitch.org/wiki/Installation_Guide. Then I followed the steps listet at http://wiki.freeswitch.org/wiki/ZRTP to get ZRTP working. Now, when I do calls from a zrtp-enabled client to another, communication still works BUT the sas-strings showing up on the clients aren't the same. Now my question is: why? Does anyone have some troubleshooting-tips for me? What possible reasons are there? 

Thanks in advance for any help.
Greetings, Finn

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