Dialogic Global Call IP Benutzerhandbuch

313

Dialogic Corporation

   .
   .
   .
case GCEV_OFFERED:
{
   if (metaevent.extevtdatap)
   {
      GC_PARM_BLKP parm_blkp = metaevent.extevtdatap;
      GC_PARM_DATAP curParm = NULL;
      printf("GCEV_OFFERED has parmblk:\n");
      while ((curParm = gc_util_next_parm(parm_blkp, curParm)) != NULL)
      {
         CRN secondaryCRN = 0;
         char transferringAddr[GC_ADDRSIZE];
         printf("SetID: 0x%x  ParmID: 0x%x\n",curParm->set_ID,curParm->parm_ID);

         switch (curParm->parm_ID)
         {
            case GCPARM_SECONDARYCALL_CRN:
               memcpy(&secondaryCRN, curParm->value_buf, curParm->value_size);
               printf("GCPARM_SECONDARYCALL_CRN: 0x%x\n",secondaryCRN);
               break;

            case GCPARM_TRANSFERRING_ADDR:
               memcpy(transferringAddr, curParm->value_buf, curParm->value_size);
               printf("GCPARM_TRANSFERRING_ADDR: %s\n",transferringAddr);
               break;

            default:
               printf("UNEXPECTED PARM_ID: %d\n",curParm->parm_ID);
               break;
         }
      }
   }
break;
.
.
.

Glare can occur on a line device during both blind and supervised call transfer operations. Glare 
occurs on a line device during call transfer at Party B when the application calls gc_MakeCall( ) to 
establish the transferred call (after the application has called gc_AcceptXfer( ) on the primary 
CRN). Glare occurs because the CCLIB IP library has chosen the same line device for an incoming 
call that the application has chosen for establishing the transferred call. The application indication 
that this glare condition has occurred is that gc_MakeCall( ) fails with an error indication of 
EGC_INVSTATE, GCRV_GLARE, or EGC_ILLSTATE. The application should retry the 
transferred call establishment request on another “available” line device. The application should 
process the GCEV_OFFERED metaevent on the incoming call/line device that caused the glare 
“normally” when it is retrieved. The call scenario in Figure 59 describes the glare condition and the 
appropriate application response.