How to open RJ11 cash drawer in c#

Question

I have a cash drawer (Model = PSHOP CD4141) and POS PC (Posbank Apexa G). I can open cash drawer via XPrinter Q900 after or before printing receipt (there is an option in printer settings). But i need to open drawer without printer. There are RJ11 ports on the POS PC. I tried this code:

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.PointOfService;

namespace POS
{
    public class CashDrawerClass
    {
        CashDrawer myCashDrawer;
        PosExplorer explorer;

        public CashDrawerClass()
        {
            explorer = new PosExplorer(this);
            DeviceInfo ObjDevicesInfo = explorer.GetDevice("CashDrawer");
            myCashDrawer = explorer.CreateInstance(ObjDevicesInfo);
        }

        public void OpenCashDrawer()
        {
            myCashDrawer.Open();
            myCashDrawer.Claim(1000);
            myCashDrawer.DeviceEnabled = true;
            myCashDrawer.OpenDrawer();
            myCashDrawer.DeviceEnabled = false;
            myCashDrawer.Release();
            myCashDrawer.Close();
        }
    }
}

But it doesn't work. Can anyone suggest how can i open cash drawer without printer?

Answer 1

I found the answer. As @kunif said, Apexa G comminucates with cash drawer on COM5 port. All i need simple Write() command. Following code works:

string port = "COM5";    
using (SerialPort serialPort = new SerialPort(port))
{
     serialPort.Close();
     serialPort.Open();
     serialPort.Write("\x001B@\x001Bp\0.}");
     serialPort.Close();
}