COM AT+CRSL: Ringer sound level
COM V1.0	21.12.2004	T. Kleinmann

AT+CRSL=?
WAITFOR (1,'+CRSL: (0-5)')

for i in range (0,5):
	AT+CRSL=i
	WAIT FOR OK
	WAIT 500
	AT+CRSL?
	WAITFOR (1,'+CRSL: ',i)

AT+CRSL=2
WAIT FOR OK


