CONST
  { Here are convenient message (error) number mnemonics }

    Sig_NTCLO	=  4; 	{ Net Link Closed }
    Sig_BYEBYE  =  3;	{ Normal Program Exit }
    Sig_NTACC	=  2;   { net link accepted }
    Sig_INITFIN =  1;   { Initialization Complete }
    Sig_ALUNERR = -1;   { assign lun fail }
    Sig_NTOPN	= -2;	{ Net Open Fail }
    Sig_TRNLON	= -3; 	{ RLON/TLON fail }
    Sig_EFNERR	= -4;	
    Sig_NTSPA	= -5;   { specify Net AST fail }
    Sig_NOTINIT = -7;	{ Initialization Failure }
    Sig_NOSLOT  = -8;	{ No net slots open }
    Sig_MSINIT  = -9;	{ MSINIT Failure }
    Sig_DUPLNK 	= -10; 
    Sig_NTREJF  = -11;  { failure trying to reject link request }
    Sig_NTACCF	= -12;  { NTACC failure }
    Sig_NTRECF	= -13; 	{ NTRec or NTRECW Failure }
    Sig_NTDSC   = -14;  { Net link disconnect }
    Sig_NTSND   = -15;  { Net Send failure }
    Sig_MSSEND  = -16;  { MSSEND failure  }
    Sig_NTCONB  = -17;  { NTCONB failure }
    Sig_NTCON	= -18;  { NTCON failure }
    Sig_MSRCV	= -19;  { MSRCV failure }  
    Sig_NTINT	= -20; 	{ Net Interrupt Msg Received }
    Sig_NTMBX	= -21; 	{ Random Net Mailbox Input }