You need a client application interface.
You need to put in
[email protected]You need to enter your password and other information.
On the other end:
Be registered with the service.
Have someone waiting to receive your call.
Service connection will be a ppoe type.
You also need to know if it is h323, sip, or another connection type.
You may need to know the acceptable video codecs.
There's a small chance of the earphone and mic causing feedback which will effect performance. You will need to test this out on each client.