SRTP is now live across our Melbourne & Sydney POP. Once you enable SRTP your will also need to set the Outbound Proxy to point to Melbourne or Sydney. You can do this by adding the below in to your Outbound Proxy Field:
Sydney and Melbourne will be the only 2 locations that will support SRTP.
Don't forget, We also support TLS, TCP and alternative SIP ports for ISP's that don't like to play nice with UDP 5060.