We have a Free PBX (18.104.22.168) with Asterisk - working well with UDP and extentions. We have tested it using SIP based mobile clients. This is a centos server.
I need an experienced person to help TLS with ZRTP setup on this server.
Please bid incase if you have already have worked with Asterisk and Freepbx with ZRTP.
Looking forward to working with you.