General Requirements
The following table shows the media types and participants allowed for each type of session. For a PC-PC session, the media type can be audio, video, or both. Application sharing and whiteboard can also be added to this session. The phone-phone session is a third-party call initiated from a third-party computer, which can be an ITSP or a corporate-deployed third-party server. For more information about the session requirements, see the Session Information and Server Requirements topics.
| Session type | Media types | Participants |
|---|---|---|
| PC-PC | Audio send and receive Video send and receive Whiteboard (T120) Application sharing (T120) |
2 |
| PC-phone | Audio send and receive | 2 |
| Phone-phone | Audio send and receive | 2 or more |
| IM | Text only | 2 |
| Multiparty IM | Text only | 2 or more |
| APPLICATION | Media streaming handled by the application. | 2 |