[Freeswitch-users] extended FS as ZRTP client

[Michael Jerris]

did you try and see if this is the case with a current release instead of the old one?

> On Mar 28, 2016, at 8:14 AM, Assaf Dahary <adahary at gmail.com> wrote:
> 
> Hi,
>  
> I would like to use FS (multiple) as a ZRTP client register on a the main FS.
>  
> I have already managed to setup a Gateway with user/pass on the FS client and register it on the main FS for regular incoming/outgoing calls (without ZRTP).
>  
> To enable ZRTP calls I setup the FS client/main as follow:
> None ZRTP SIP phone -> FS client -> NAT Internet -> FS main -> CSipSimple ZRTP enabled).
>  
> FS Client (ver 1.4) :
> ZRTP enabled globally in VARS and in dialplan.
> Media proxy disabled on both internal and external profiles and in dialplan.
>  
> FS Main (ver 1.4):
> Media proxy enabled – including late negotiation.
>  
> I forced the FS client and the CSipSimple to use only PCMU codec to avoid transcoding.
>  
> The problem is that on a call from the SIP phone via the FS client there are always CRC errors on the ZRTP log.
> Only if the FS main is set to disable media proxy then there are no CRC errors – but then it becomes a MITM with incompatible SASs.
>  
> From reading other posts about FS and ZRTP CRC errors I assume that it happens because the FS client is not creating a zrtp hash in the invite SDP.
>  
> So my question is how to make the FS client to generate the zrtp hash in the invite SDP to act as real ZRTP enabled client? 
> I've already tried to set the FS client internal/external/dialplan with several zrtp configs with no success.
>  
> I would appreciate any tip to resolve this issue.
>  
> Regards
>  
> Assaf  
>  
>  
> The client FS 
>  
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