You can stop the beeps by turning off the Trouble Beeps in the Siren Options menu.
Here are the steps:
1. Select the ''gear'' or ''settings'' icon on the bottom right side of the screen.
2. Press the Down Arrow 3 times
3. Press the "Enter" button next to Programming
3. Enter Installer Code (Press "4321")
*Note: If the default code does not give you access, Click Here for further assistance.
4. Press "Siren Options"
5. Uncheck the box labeled "Trouble Beeps"
6. Press the ''Close'' button twice
Congratulations, you have successfully turn off the trouble beeps on your Simon XTi alarm system!