This video-specific structure uses the timeslot of a MUX endpoint. MUX_ENDPOINT_ADDR is used as a parameter in the MSP_ENDPOINT_ADDR structure, which is used with mspCreateEndpoint.
typedef struct tag_MUX_ENDPOINT_ADDR
{
// Address attributes
DWORD nTimeslot; // Timeslot address
} MUX_ENDPOINT_ADDR;
For more information, see Creating the MUX endpoint and the MSPP Service Developer's Reference Manual.