Operator's guide
straight to the
login:
prompt by connecting direct to the serial port and typing
forcegetty
It may take several attempts for this to succeed.
Sensor arrays
Another possible reason for setting the DATA OUT port's service to gcf_out is
to allow several DCM units to work together and aggregate the inputs from an
array of sensors.
Here, DATA OUT ports with gcf_out as the service output data to the serial
inputs of another DCM or AM module, which aggregates them all and sends
them out over a network connection.
The DCM can handle multiple data sources with ease using the gcf_out service.
In practice, however, it is almost always preferable to set up a local area
network and use PPP over any serial links, so that GCF, Web and SSH traffic
can share the same connection. Setting up a fully networked array is slightly
more involved than using the simple gcf_in and gcf_out services, but affords
much more flexibility. See below for more details.
December 2005
27
