StartPlaySignal() private method

private StartPlaySignal ( ushort wchnlNo, ushort SigType ) : void
wchnlNo ushort
SigType ushort
return void
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        //拨号
        public string CallPhone(int lineNum, string phone)
        {
            LineInfo line = Lines[lineNum];

            //判断话务员是否摘机
            if (line.State != (int)state.CH_DETECT)
            {
                return("请先摘机,然后拨号!");
            }
            //如果是内线,并且状态为空闲
            if (line.Type == (int)type.CHTYPE_USER)
            {
                //执行拨号
                LineInfo inline  = Lines[lineNum];
                int      trunk   = getFreeTrunk();
                LineInfo outline = Lines[trunk];
                InvokeVcDll.StartPlaySignal((ushort)lineNum, (ushort)signal.SIG_STOP);
                InvokeVcDll.StopPlayFile((ushort)lineNum);
                InvokeVcDll.StopPlayFile((ushort)trunk);
                inline.ConnectToLine  = trunk;
                inline.CallerPhone    = phone;
                outline.ConnectToLine = lineNum;
                outline.CallerPhone   = phone;
                outline.IsKey         = false;
                InvokeVcDll.OffHook((ushort)trunk);
                outline.State = (int)state.CH_CALLPHONE;
                InvokeVcDll.SendDtmfBuf((ushort)trunk, phone);
            }
            return("sucessful");
        }