When Comfort is armed to Away Mode, by default the Siren/Bellbox will give 2 loud squawks. This is useful to confirm to the user that the system has been armed correctly and has not had an Arm Failure

For those who find it too loud, they can disable in Security Types > Siren Types > AwayArmed Siren - Uncheck \"Bell Output\"
If programming by Keypad Engineer Menu, refer to the Worksheet Table 25, and set Outputs - Siren to Off