AT COMMANDS, PROBLEMS, REFERENCE AND FAQ
93
7. Control by AT commands
The router is controlled and programmed by AT commands. Structure of the AT
command match used module MC75i. AT commands are possible to find on website
www.siemens.com/wm.
8. Possible problems
Some network cards are able to be set in situation, when it is not possible to connect
the router. It is possible to solve this problem in the following steps:
hand by selection communication rates 10 MB/s in property network cards,
connect router over switch,
starts computer only after finalization start router.
9. Reference
[1] Siemens: MC75i_ATC_V00.031 – AT command Set, 2008
10. FAQ
I can’t get from internet on equipment, which is connected to router and I have NAT
enabled.
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 -50dBm and -
90dBm.
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.
LUCOM GmbH * Ansbacher Str. 2a * 90513 Zirndorf * Tel. 09127/59 460-10 * Fax. 09127/59 460-20 * www.lucom.de