VoIP Business provides a reliable and simple phone system to the small or large businesses. It can take away most of the telephonic problems. Unlike PSTN technology, Business VoIP uses the fax transmission to convert data into packets and deliver the data packets more securely and reliably. VoIP Phone System has a flexible network connection layout. It can use SONET, ATM to work. It is a standardised system because it needs less hardware management, which makes it far more fault tolerant.