User guide

Appendix B. Technical Details of Special Modes of Operation
B-3
the RS232 device will re-awaken the datalogger. This prevents spurious messages
from the RS232 device (such as ‘loss of carrier’ messages from a modem) waking
up the datalogger. The only consequence of this delay is that specialist software
which polls dataloggers at frequent intervals will not be able to wake the same
datalogger again during the delay period.
Campbell Scientific are aware of some modems which will re-trigger the ring line,
despite this delay. The only consequence of this is that the datalogger will remain
in communications mode for an extra 30 seconds after the end of the call; this will
waste a small amount of power and delay any output to a Storage Module.