How do I access voip

I am attending a webinar which requires I be on voip. How do I get voip and how do I use it.

Voice Over Internet Protocol (VoIP) is simply a name for telephone service that is sent and received over the Internet. Beyond that, specific services depend on the service provider. Before getting the service I would make sure you understand exactly what is required to make sure the service you select is capable.

The link below has a list of providers and rates:

http://www.voip-compare.net/index.php?src=google&kw=compare&gclid=CM_LjpHdyKYCFRVx5QodXSsTJw