Before setting up a machine for FoIP, we recommend running BabyTel's SIP Validator.  This requires Java to be installed, which you can obtain from

To run the validator, enter the link in your Java-enabled browser, and accept the Java warning:

Assuming that you have a good connection and no firewall issues, you will next see confirmation of this:

Press the Quality Check button to run some checks on the quality of your connection.  A good result will show as:

The screen below shows a poor WiFi connection.  Entries marked ** indicate a system which will struggle to run FoIP.  A mark of * indicates a 'fair' value which is less than optimal but may allow FoIP to operate.