I've found that Jitsi and Lumicall can communicate using SRTP, but not ZRTP
Lumicall is sending HELLO, it doesn't hear a response.
Also, the Lumicall log doesn't show incoming HELLO messages from Jitsi
I notice Jitsi sends the SDP attribute for ZRTP:
The spec doesn't mandate the use of this attribute and Lumicall doesn't
currently use or send the attribute - it just throws ZRTP HELLOs into
the RTP stream (the most basic implementation possible)
Should Jitsi work with a client like Lumicall in this scenario?
Can you suggest where to start troubleshooting on the Jitsi side?