ection of hardware and setting (Premise: The environment where the receiver is located is in a good
condition without serious barrier, severe electromagnetic interference, etc. and the parameters of
handheld controller are set correctly);
Solutions:
1) Check whether the settings are correct [IP address, port, operator, communication mode, grouping
number, group number (or source node, VRS user name, code, data protocol), etc.] (In case of
minicomputer, it must be connected external GPRS antenna);
2) Confirm whether phone card is in arrears condition or is damaged and the installation is correct
(whether it is loose); Check whether the phone card is compatible;
3) Check signal strength of GPRS network in the place where the instrument is located, if it is lower
than 20, it indicates that local signal is poor. Please try to replace the network or position;
4) Inquire whether CORS server is in normal condition (if it is connected with VRS, it is required to
confirm whether the account is effective or is occupied), and judge whether the problem is caused by
the machine by logging in with other instrument;
5) Check whether the network module of the receiver is in normal condition(Check module by
pressing Key F2 for 6s for V30)
6) Check whether the network module of the receiver is loose, if it is, directly weld to reinforce it;
7) Reset the mainboard;
8) Refresh receiver firmware.
B. Confirm whether the receiver logins in the server normally, if it logins in the server, the receiver
can make ding-dong sound once again and broadcasts "connecting successfully", otherwise, please
call query staff for confirming whether the server is running normally;
C. Confirm whether differential lamp (middle lamp) of receiver flashes normally (Constant green
lamp is on that indicates that the network has been connected, red lamp flashes once for 1s that
indicates that the difference is transmitted once for 1s).
4) Power off and reboot;
5) Reset the mainboard;
6) Refresh receiver firmware of rover.
6.4 Internet accessing issue
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Trouble shooting