ABORT BUSY
ABORT 'NO CARRIER'
ABORT VOICE
ABORT	"NO DIALTONE"
""	ATZ
OK	AT+CPIN="1234"
OK	AT+CGDCONT=1,"IP","dns.name.of.pdp.context"
OK	ATDT*99***1#
'CONNECT'	'\c'
'TIMEOUT'	'5'