This is the modem 'AT' command string which can be sent
for modem configuration. When read, it gives the last
response from the modem. If the modem response is greater
than 256 bytes in length, the first 256 bytes are read.
This object is stored in non-volatile memory and
controls the scanning process. The first time the unit
is powered, the non-volatile memory is set to dmaScanOff.
Setting dmaScanOn will begin the scan process. Setting
dmaScanOff will stop the scan process and clear any current