Campbell COM110A, User Manual

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CS-GSM/GPRS Digital Transceiver Kits (including the COM110A modem)
F-2
11.
The logger should then report “opening 2” (in the case of ComME), which
means you now have a “talk through” path to the modem, i.e. it should
respond as if connected directly to the PC.
12. If the modem is being use for GPRS use and particularly if the modem is set
to use its own TCP/IP stack it will be necessary to get it back into command
mode, by sending “+++” then waiting for a response, normally OK.
13. Then to check it is responding normally send “ATZ” and press enter, the
modem at a minimum should respond “0” or “OK”, unless it has been
configured at the wrong baud rate or all responses have been turned off.
14. If there is no response at all, please consider the baud rate may not be set as
expected, so press ESC a few times to quit the talk through session, back out
and return to step (5) above to change the baud rate of the logger serial port,
then try again.
15. Once a valid response is received, enter the configuration command you need
to change as normal, remembering to save the setting to non-volatile memory
if required (AT&W).
16.
When completed press “ESC” three times to quit the talk-through mode.