1. On the desktop, Double-click My Computer.
   
2. Double-click Dial-Up Networking.
   

   

3. Click the DigiTex.net icon.
4. From the File menu, choose Properties.
5. At the bottom of the General sheet, click the Configure button.
   

   

6. Click the Connection tab.
7. At the bottom right, click the Advanced button.
   

   

8. Add the desired AT commands in the Extra settings field.
   

   

9. Click the OK button.
10. On the Modem Properties sheet, click the OK button.
11. Click the OK button.