| 1490 | TCP connection for the Conference engine supporting whiteboard/chat/file transfer. |
| 6670 | Client application uses TCP port 6670 in order to reach the VocalTec servers. |
| 6667 | An alternate port other than 6670 used to connect to servers. |
| 22555 | UDP traffic between users that carries the audio connection. |
| 22793 | TCP connection to VocalTec's Addressing servers. |
