Appendix c – wireless troubleshooting, Measurement systems international – Rice Lake MSI-9850 CellScale RF Digital Indicator - Ethernet Option Supplement User Manual

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MEASUREMENT SYSTEMS INTERNATIONAL

Appendix C – Wireless Troubleshooting

The main challenge is getting the 802.11 equipped MSI-9850 to associate with a Wireless Access Point
(WAP). Once this is accomplished the MSI-9850 can be further configured by using the Scale
Discovery Utility.
The settings below are the default settings that the MSI-9850 will attempt to look for in an access point.
Once the MSI-9850 is associated these settings can be changed, provided they are changed on the MSI-
9850 AND the access point. At this point, encryption and authentication can be setup.
ACCESS POINT SETTINGS (case sensitive):
SSID: Connect
Authentication: none (i.e. open)
Encryption: none
Channel: Auto (1, 6, 11 preferred)
Mode: Infrastructure (as opposed to Ad Hoc)
DHCP server: enabled
The MSI-9850 by default will look for an access point with an SSID of "Connect". If it can't find
"Connect" it will then look for an Ad Hoc network with and SSID of "Connect". If that fails it will then
associate with the strongest unencrypted access point signal regardless of SSID. If there are more than
one access point the MSI-9850 will attempt to associate with the SSID of "Connect", regardless of
signal strength. The MSI-9850 needs an access point without authentication or encryption. It will not
be able to associate if either of them is enabled. It can associate with any channel but 1, 6, or 11 are
preferred (assuming North America). The MSI-9850 by default will look for an access point in
Infrastructure mode. It will come up in "BSS_Join" mode.
Once the MSI-9850 has successfully associated with the access point, assuming that the module has not
been assigned a static IP address, it will attempt to acquire a dynamic IP address from any available
DHCP server on the network.
OTHER TROUBLESHOOTING TIPS

Make sure the AP is running in mixed or "B mode" (802.11b). If it is running in "G Mode"
(802.11G) only the MSI-9850 module will not be able to associate with it as it can only do B
mode (11 Mbps).

If you continue to have problems, then try to force the MSI-9850 to associate with the desired
access point. Remove the antenna from the MSI-9850 and move it within a few inches of the
desired access point. Check the above settings on the access point. If you have any other access
points in the area you might want to power them off.

Make sure the access point is not blocking multicast IP traffic. The Scale Discovery Utility
uses multicast IP to find and configure scale network settings.

Make sure the access point being used has the newest firmware loaded onto it. In rare
circumstances, errors in the access points firmware can impede communications.

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