Partial Feature list:

• CallerID – Use the landline lookups or do a  name lookup against your company phonebooks, etc.
• Unlimited local extensions and incoming lines- limited only by the bandwith at your location.
• Remote extensions- Have a home office too?  Call your employees for free.  Touring europe?  Take a wireless handset with you and communicate for free whenever you have wifi.
• Voicemail- You can have separate voicemails for local extensions, and voicemail directly to email if you’re on the go.
• Interactive Voice Recordings- Route a call into an IVR to free up your office manager for other tasks!
• Time Conditions- Set your office hours and holidays so customers know when you’re away!
• Call forwarding, call transfer, and conference calling
• “Follow me” features- ring your home and cell phone if no one answers at the office.
• Conference lines- setup lines for your remote employees or customers to conference in.  Saves thousands of dollars per year vs. the traditional approach.
• Call recording- Record your important calls to scour them for important content
• Call Reporting- Unlimited call reporting; information on who calls when, how long your calls last (great for billing!) and percentages of answered calls, etc.
• CallerID Blacklisting- Get rid of those pesky solicitors!
• Integration with analog lines- Voice over internet is great and provides the best possible call quality.  If you’re nervous about your internet connection, it is VERY CHEAP to integrate with your traditional local carriers.