The MPR_DEVICE_0 structure stores information about a device used for a link in a multilinked demand-dial interface.

 typedef struct _MPR_DEVICE_0 {
   WCHAR szDeviceType[17];
   WCHAR szDeviceName[129];
 } MPR_DEVICE_0,
  *PMPR_DEVICE_0;

szDeviceType: Specifies a null-terminated Unicode string that indicates the RRAS server device type referenced by szDeviceName. See MPRI_INTERFACE_2 (section 2.2.1.2.83) for a list of possible device types. 

szDeviceName: Specifies a null-terminated Unicode string that contains the name of the TAPI device to use with this phone book entry.