Advantech ER75s User Manual page 105

12. FAQ
I can't get from internet on equipment, which is connected to router and I have NAT en-
abled.
The device's gateway has to be configured as the router.
Router resets itself, connection on Ethernet fails.
It is necessary to use an antenna, which will be situated far from power supply.
I don't get on web server at NAT.
The remote http access of the router has to be disabled, default server address has
to be your web server and the gateway of the web server has to be the IP of router.
GPRS connection fails.
Check signal power. If signal power is weak, you will have to use a better antenna.
If the environmental cells have a similar signal it will be necessary to use a directive
antenna. Signal levels have to be in the range -50 dBm and -90 dBm.
It is necessary to set ping, which will check the connection and, in the case of fail
ping, restart connection.
GPRS connection won't be established.
Recheck GPRS settings – APN, name, password and IP address.
Try to enter PIN – verification if the SIM card hasn't set PIN code.
In private APN it is appropriate to switch the DNS server send off.
Switch log system on and observe where the error turns up.
Connection fails on Ethernet or connection isn't establishing.
On ethernet interface of the router it is possible to switch auto negotiation off and
set a rate and duplex by hand.
How is it possible to enter AT commands?
It is necessary to use a USB connection, but it is impossible to connect to GPRS
from the router together.
DynDNS not function.
In private APN not functional.
If the same IP address is recorded in your canonic name as dynamically assign
address, it means that the operator is using NAT or firewall.
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