Instruction manual

WARNING: The red LED power indicator/switch on the RJ11C interface box is lit when the cellular
transceiver is on. The control line from the datalogger must be used to turn the transceiver off and
on. DO NOT USE THE RED LED POWER BUTTON AS A SWITCH. If the transceiver is manually
switched off while under datalogger control, the datalogger will not be able to turn it on again. Refer
to Section 9.
NOTE: The COM200 or COM210 field phone modem when used with the COM100 Cellular Phone
package supports 300, 1200, 2400, and 4800 baud connections. Campbell Scientific datalogger
serial ports support a 300, 1200, and 9600 baud terminal connection. Additional commands must
be sent to the PC calling modem during the dialing sequence to allow a 2400 and 4800 baud
modem connect speed with the field modem. Check your calling modem manual for support of this
feature. Bandwidth limitations over the Analog Cellular Phone System prevents a reliable modem
connection above 4800 baud.