# Video Messaging Interface architecture

The following illustration shows the internal architecture of the Video Messaging Server Interface. The two shaded boxes in the diagram (the ADI service and MSPP service) show the Natural Access features that Video Access uses.

Independent video and audio paths provide applications with a flexible media delivery mechanism between the host and the IP network.

The Video Messaging Server Interface does not directly support video transcoding. Developers can provide this functionality with a separate video transcoding unit, such as the NMS Video Transcoder. However, host applications can configure CG boards to perform audio transcoding during either play or record operations.