/system scheduler
add name=startup-beep on-event=":delay 15000ms;\r\
\n:beep frequency=810 length=500ms;\r\
\n:delay 400ms;\r\
\n:beep frequency=600 length=200ms;\r\
\n:delay 100ms;\r\
\n:beep frequency=470 length=500ms;\r\
\n:delay 500ms;\r\
\n:beep frequency=400 length=500ms;\r\
\n:delay 400ms;\r\
\n:beep frequency=600 length=200ms;\r\
\n:delay 100ms;\r\
\n:beep frequency=500 length=500ms;\r\
\n:delay 1000ms;" policy=\
ftp,reboot,read,write,policy,test,password,sniff,sensitive start-time=\
startup