typedef struct {
  BYTE alarms ;       /* 0 = no alarm
          * 1 = Far end loss of frame ("yellow")
          * 2 = Alarm Indication Signal ("blue")
          * 4 = Loss of frame (T1 "red") E1: Loss of
          *  sync, excessive BER
          * 8 = (E1) Far end loss of MF sync
          * 0x10 = (E1) TS16AIS 
          */

  BYTE sync        /* 0 = in sync
          * 1 = loss of signal
          * 2 = no (frame) sync
          * 4 = no multiframe sync
          * 8 = No CRC Multiframe Sync 
          */

  BYTE alarmsent       /* 0 = no alarms
          * 1 = sending loss of frame
          * 2 = sending AIS
          * 4 = sending loss of multiframe (E1 CAS)
          * 8 = sending TS16AIS (E1)
          */
  BYTE  spare
} DTM_TRUNK_STATE ;

typedef struct
{
  DWORD size ;         /* size of this structure      */
  DWORD board ;         /* board number                */
  DWORD trunk ;         /* trunk number                */
  DTM_TRUNK_STATE state ;         /* alarms and sync status      */
  DWORD starttime;         /* when counts started (time_t)*/
  DWORD slips;         /* slips accumulator           */
  DWORD lineerrors;         /* line code violations (BPVs) */
  DWORD frameerrors;         /* frame bit errors+ CRC errors*/
  DWORD es;         /* errored seconds accumulator */
  DWORD ses;         /* severely errored seconds    */
  DWORD uas;         /* unavailable seconds         */
} DTM_TRUNK_STATUS ;

typedef struct
{
  DWORD size;        /* size of this structure                      */
  DWORD maxevents;        /* max number of events per second    */
  DWORD reportmask;        /* controls when to send events           */
} DTM_START_PARMS ;