The ability to see, which contacts are online/offline, and maybe some other status information.
You can decide ad hoc meetings according to this status information.
To which extent do you need to install client software to use the system?
To which extent can you schedule your meetings, send out invitations to participants with calendar events etc.
Do the systems fully support the three major platforms?
Can you as a meeting host restrict the access to tools, content, areas, as well as give full access to all tools, content and areas. Maybe the access management is define according to specific roles: Host, Presenter etc.
Is it possible to set up permanent meeting rooms that can be "reused", and does the content you have uploaded/created stay as you left it? I.e. Chat content, presentation, annotations, whiteboard drawings.
Will a team of individuals be able to collaborate and share content during meetings as well as share the same content asynchronously in the same meeting room or environment?
To what extent does the system support rock solid audio and video conferencing, as well as easy audio and video management (configuring audio/video devices etc.)
Does the system support more than 10 concurrent audio and video connections, full duplex?
Does the system support more than 50 concurrent audio connections, full duplex?
Can participants raise hand or in any other way show status indications? I.e. Agree, disagree, etc.
Does the system support chat functions, such as chat send to forum, to individuals, submitted and moderated chat functions. I.e. chat which is not send to forum instantly, but that is being filtered/moderated.
Is it possible to show and playback a powerpoint presentation, or similar?
Is it possible to share a video, animation or audio productions, where every see and hear the same, and where playback can be controlled?
Is it possible to draw / annotate on all the content shared, be it pictures, presentations, whiteboards, videos, animations etc?
Does the system support high quality screen sharing, and the ability to share more screens at the same time?
Is it possible to remote control the screen sharing, and can more individuals remote control at the same time?
Does the system support whiteboard functions, and can all meeting attendees write on the white board at the same time?
Is it possible to share an editable text, and do all individuals have access to the editing tools and features?
Does the system support polls, QAs, test functions and training tools? Can you run the tests etc during meetings as well as off-meeting/on-demand?
Can you split up the meeting attendees into smaller groups, and assign specific content for them to work on?
Is it possible to show the curser activity/presence of each individual in the meeting?
Can you easily start the recording of all the content and activities in the meeting, as well as very easily publish that content to a greater audience, without any processing.
Can the user interface be modified and customized to the needs of the meeting situation and the meeting individuals?
Does an API exist, which allows 3rd party developers to create extensions to functions, tools, content of the existing system?
To which extent is web conferencing and meeting features supported on mobile devices and tablets? I.e. Android, iOS, Blackberry, Windows Mobile.
To which extent can H.323/SIP video conferencing endpoints be used together with the system? Does a "two-way" integration/gateway exist between the H.323 systems and the web conferencing system?
Is it possible to integrate the web conferencing system with various Learning Management Systems? I.e. Moodle, Blackboard, etc.
To which extent does the system support many types of meeting, collaboration and use case scenarios?
Live event, 1-3 presenters (subsequent) are showing audio, video and presentation or demo.
5-40 participants can discuss by requesting the microphone.
Didactically prepared content. 1 presenter showing audio, video and presentation or demo. Recorded for on-demand view at any time. Not interactive.
Geographically distributed teaching. Students participate actively (poll, quiz, assessment).
Replacement for H.323 video conference
Synchronous and asynchronous work between remote sites in same project. Collaboration in "Virtual Organization".
Replacement for Remote Desktop with control feature