Comparison between BigAnt IM Standard version and Pro version?

Standard

Profession

BigAnt Messenger features
Instant/Offline messaging
Group discussion
File transfer/forward
Right-click Quick Send
Alert for new incoming message or call
Voice chat and video chat
Remote desktop sharing
Enable Document Management
Send bulletin message and discussion
BigAnt IM Server
Active Directory/LDAP integration
Create Roles and assign permissions
Create Roles and assign permissions
View all users presence status
Specify company logo and name on IM client
Enable Document Management
Support LAN, VPN, WAN, internet connection
Host free live chat on your company website