If you're worried about your network connection, you can easily run a pre-visit test by leveraging the tools listed below:
General Configuration Test: test.webrtc.org
Tests hardware setup, connection and network stability.
Tokbox Diagnostic Test: go.hale.co/visit-test
Provide diagnostics specific to Tokbox services and expected quality.
Internet Speed Test: speedof.me
General network connection, including speed and latency.