I've tried Google Voice, cell phones, Grasshopper, Avaya, RingCentral and several others. I have yet to find a system that I love. Each one solves some of the problems but the rest feels like a kludge.<p>Key for me are:
- Simplicity to transfer calls
- Compatible with physical (conf rooms and desks) and mobile phones
- Simple to administer
- Scales well for an office of 20+<p>Any advice?