Nextiva understands that communication is the heart of any business. With Nextiva business-class SIP Trunking service, you can save money on all your business communications, increase your return on investment, and benefit from unlimited local and long distance calling — all without the cost of switching your existing PBX equipment. If your business does not have on-premise PBX, we recommend considering Nextiva Office. A cloud-based Business VoIP service that has been awarded Internet Telephony Magazines Product of the Year for the past three years.