Change communication to TCP

I need to change RTP communication to TCP (from UDP) how to do it? Simply in every extension or more action is needed?

I have FreePBX Stable-5.211.65-11.

You can limit your extensions to use tcp (or tls/upd or any combination) You will have to negociate with your provider for them to use tcp.

Be aware however that many phones both soft and hard just don’t do tcp though.