# Get current setting
AT^U2DIAG?

# Set to modem only mode
AT^U2DIAG=0

# Set to modem + CD-ROM
AT^U2DIAG=1

# Set to modem + CD-ROM + card reader
AT^U2DIAG=255

# Set for modem + card reader
AT^U2DIAG=256

# Set UNKNOWN
AT^U2DIAG=276