C4 IP goes beyond typical VoIP offerings by delivering a fully hosted VoIP and unified communications solution that includes voice and data access, desktop and soft phones, local and long distance, voicemail, collaboration tools and remote office functionality. With C4 IP, you can leverage enterprise-class communication services such as real-time presence, desktop video, unified messaging, chat, file sharing, and Outlook integrationÑwithout the complexity and time required to build a premises-based solution and without the capital investment.