In essence, cell phones will use the same basic VoIP system that computer softphone software programs and many long-distance carriers do now.

In 2005, Atlantic.Net expanded data center services to cover VoIP systems.

Prior to this, independent VoIP systems, e.g. Ventrilo, were used.

Other phone systems like plain old telephone service and non-compatible VoIP systems, are supported through gateways.

When VoIP systems first gained popularity, customers had problems accessing 9-1-1 emergency services.

So, the next hurdle I had to face was getting my "regular" phones on this new VoIP system.

Various technologies, including circuit switched and hybrid VoIP systems, are used depending on service areas.

Already, many phone networks have terms and conditions that prohibit the use of VoIP systems.

When a consumer makes a call, Verizon's application reroutes it to the telco's VoIP system.

It would not surprise me to see Skype, and other VoIP systems, as the next subject of government scrutiny.