Do Not Disturb
It does exactly what the name implies. You can turn this feature on to temporarily stop incoming calls on your phone. This is useful during conferences, meetings and lunch time.
Web Based Configuration
Enable digital communication sessions to be held over the web between web users. It allows customers to have a web based call without leaving the website. There is no requirement for any additional telephone equipment.
Call screening helps user to filter calls. It gives user ability to receive or reject a call by looking at the caller id.
Call waiting allows you to receive and answer an incoming call while you are already engaged in an active call. Upon receiving the call wait notification, user can put the first call on hold and receive the second call.
Presence technology allows you to share your availability information with others in your phone list and vice versa. It shows where you are and how you can be contacted.