
CS-3G Digital Transceiver Kits (including the COM111 modem)
16
6. Installation of the COM111 modem
6.1 Configuring and fitting the SIM
Before the COM111 modem can be configured, used or tested, it must be
fitted with a ‘SIM’ card (Subscriber Identification Modem) that enables it for
use on a specific cellular telephone network in a particular frequency band.
If possible, ensure that the SIM is configured so that it does not require a
Personal Identification Number (PIN) security code to be entered after the
modem is powered up. The PIN can most easily be disabled by inserting it
into a separate, hand-held standard GSM phone and following the
instructions contained in the phone manual. If a separate phone is not
available, please contact Campbell Scientific for details of how to disable the
PIN code for use with the COM111. If this is not possible, or if your airtime
provider only allows operation with a PIN enabled, please refer to
Appendix E.
Some SIM suppliers send the SIM with the PIN enabled and
set to a default PIN number. Check the documentation that
came with your SIM
The SIM card is installed in the COM111 modem in the slot at the aerial end
of the case. Before installing the SIM make sure power is disconnected from
the modem. The SIM is installed in a small tray that has to be ejected by
pushing in the small green button which is to the rights of the slot holding
the tray. Use a pen or similar to push the button inwards. Insert the SIM
with card with the gold contact side of the card facing upwards in the tray.
Ensure the cut-out of one corner of the card is orientated to match the recess
in the tray so the SIM sits flat in the tray. Push the tray back into the slot
until fully in then, with the aerial connected, power on the modem and check
if the LED starts flashing within a minute or so to indicate successful
registration on the network.
6.2 Connection to a Datalogger
The COM111 modem can either be connected directly to the RS232 port of
the data logger, if it has one, using the RS232 cable provided as part of the
CS-3G RS232 kit or to the CS I/O port of dataloggers that have this port,
using an SC-105 as provided in the CS-3G SDC kit.
If a CS-GSM package was purchased the logger interface will be the
SC-WMI interface. The SC932A can also be used for older loggers that only
have CS I/O ports but do not support SDC communications.
The SC-WMI or SC932A are not recommended for use where
other devices are sharing the CS I/O port. The maximum baud
rate the SC-WMI supports is 38400 baud.
It is advisable to make sure you are running the latest
operating system in the data logger before deploying a GPRS
system to ensure you have all the latest IP related features in
the data logger and to ensure best reliability.
NOTE
NOTE
NOTE