US VoIP services have topped the $20 billion mark in first half of the year.

It seems that there may have been some truth to VoIP services being an affordable alternative to traditional phone systems.

Businesses and homes have been capitalising on the internet telephone system and more growth is set for the second half of the year.

Home use is still where the majority of the revenue is coming from, with the number of subscribers growing 14% from the end of 2008 through until the first half of 2009.

Businesses are expected to get involved with VoIP more and more as unified communication grows; unifying all company correspondence.