How much latency and jitter can the system handle over the IP link?

The NetworkInterface can handle jitter up to 500ms. You will hear this as a delay but will not loose any information.

Details about the settings can be found here.

With the help of a RadioServer even worse conditions can be handled.

For systems with very high jitter, typically a satellite connection, we have a special version of the RadioServer that will handle this. Read more here.