1. Can receive off-line message including attached files ?

2. Can check read or not about your sent message ?

3. Can transfer messages and files between private networks?

4. Can support mass messaging ? mass concurrent users ?

5. Can support easy interface with legacy system.

6. Can support user friendly interface like MSN messenger or outlook ?

7. Can support security for encryption of messages and files ?

8. Can support MP3 level quality of voice/video chat ?

9. Can support voice/video chat between private networks ?

10. Can support central log for administration ?