Import 3Cx TLS-Certificate in 3CX Phone

[3cxisti]

Hi,

we have a hosted free 3cx system with a TLS-cetrificate.

How can I import this certificate on my notebook that allow me to use 3CX Phone for TLS/SRTP - protected conversations.

The same question regards my other clients as well: AVM Fritzbox, Snom M9, Bria 3 etc.

A 2nd question:

How can I observer on the system ob TLS / SRTP really works. This is very importan to know if everythink works.

Thank you.

I.