Third-Party Voice Mail Support allows you to specify how to handle your voice messages on an external, third-party voicemail system.
Third-Party MWI Control enables the system to receive message waiting indicator (MWI) events from external network elements.
MWI Delivery to Mobile Endpoint delivers a notification to your mobile phone when you receive a new voicemail, fax, or video message.
Voice Portal Calling allows you to make calls from any other phone as if it were your desk phone. Once you have dialed in to the Voice Portal and authenticated yourself, select the Make Call menu option and enter the destination digits.