If the RS-232 connection between a data logger and a Raven XT-series modem works fine, but the CS I/O connection does not work, what might be the cause?
To connect the modem to the data logger’s CS I/O port, either the SC932A or the SC105 must be used. This communication also depends on the configuration of the ports on the modem and data logger (PPP versus serial server); the two must match.