What are the best messaging and VOIP systems for medium to large corporate networks?
What have you found to be the best in your experience and why?
It should support:
- Instant messaging
- Video and audio calls
- File transfer
- And it should be easy to setup - 10 servers with arcane configs, not accepted
Bonus features would be:
- Conference calls (multiple participants)
- Screen sharing
I expect a server/client setup, though a client-only solution (P2P) would be welcome as well.
If the system is open-source, then its perfect for my setup.
I've heard of: