As part of the company's Google Fiber operation, it works with phone, tablet and laptop computer and brings subscribers new features such as transcribing voice mails and delivering them as text messages or email.

In direct completion against local telecommunications carriers and internet service providers, or ISPs, the cloud-based service is currently available in three US cities where Google Fiber is deployed, namely Austin, Kansas City and Provo, and is expected to expand to Salt Lake City, Nashville, Atlanta, Charlotte and Raleigh-Durham.

Two more cities, Louisville and Huntsville, are listed as candidates. The landline service comes along with Google Fiber's ultra-fast internet access. With cloud, wrote Google Fiber product manager John Shriver-Blake in a blog post, "it can ring your landline when you' re home, or your mobile device when you're on-the-go".