What is IP voice or SIP?

Voice over Internet Protocol (VoIP) technology lets you use the Internet to make and receive telephone calls.

For VoIP, you need a broadband Internet connection, plus a traditional phone and an adapter; a VoIP-enabled phone; or VoIP software on your computer.

Most consumer VoIP services use the Internet for phone calls. But many small businesses are using VoIP and unified communications on their private networks. That’s because private networks provide stronger security and service quality than the public Internet.

VoIP and unified communications enable you to:

  • Reduce travel and training costs, thanks to web and video conferencing
    Easily grow your phone system as needed
  • Have one phone number ring simultaneously on multiple devices, helping employees stay connected to each other and to customers
  • Reduce your phone charges
  • Have a single network for voice and data, simplifying management and reducing costs
  • Access your phone system’s features at home or at client offices, in airports and hotels—anywhere you’ve got a broadband connection