IP Office Basic Edition: Ideal for small and growing businesses, Basic Edition provides basic voice telephony and messaging, including voice mail, message to e-mail conversion, call forwarding, audio conferencing, automated attendant and growth to 100 users.
IP Office Essential Edition: Builds on the Basic Edition by adding IP telephony and mobility features, including one-number access and dial by name/extension. Scales to over 350 users.
IP Office Preferred Edition: All the features of Basic and Essential Editions with integrated unified communications, including IM and presence, web collaboration, mobile access, video, and call recording. Integration with business applications along with a multi-channel contact center is also provided.