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 |