www.cooperbussmann.com/wirelessresources
Cooper Bussmann 945U-E Wireless Ethernet Modem & Device Server User Manual
83
Rev Version 2.14
Access Point
Beacon Miss Count
Number of beacons unable to be sent (100-msec intervals) due to interference or
CCA.
Beacon Missed
Reset Count
After 15 consecutive beacon misses (1.5 seconds), this count will increment by 1.
This will indicate high interference as the access point is holding off sending beacon
and utilization will increase.
TX Queue stopped
because full
Message buffer (Ethernet Frames) in radio queue. If the radio cannot transmit due to
high noise, this will increment. When the buffer is full, all new messages are dropped.
Buffer size is 150 messages.
Client
Beacon Missed
Interrupts
The number of beacons (100 msec) the client has missed from the access point.
TX Failed due to too
many retries
The number of frames that have been lost.
Original M 7 Retries = 1 TX Failed due to too many retires. Each retry is sent
within a few milliseconds.
TX Failed / TX Antenna Profile = Frame Packet Loss Rate (number of undelivered,
as a percentage).
RX Failed due to bad
CRC
This can be from any access point, not only your own. If other Wi-Fi networks are in
the area, this number could be high due to other encryption keys or weak signal.
RX Failed / RX Antenna Profile = RX Frame Error Rate (this can be high due to other
wireless devices in the area).
Broadcast Notes
When a broadcast message is sent from the client to the access point, the access
point will always ACKnolwedge the client. When a Broadcast Message is sent from
access point to the client, no ACK will be sent back.
Management Frames
Can be probes, authenticate/associate messages, RTS messages, beacons, and so
on.
Network Traffic Analysis
There are many devices and PC programs that will analyze performance of an Ethernet network. Freely available
programs ,such as Ethereal, provide a simple cost effective means for more advanced analysis. By monitoring
traffic on the wired Ethernet, a better idea of regular traffic can be discovered. Network Analysis programs make
configuration of a filter for the 945U-E a simple task.
4.6 System Tools
The System Tools Page has a number of tools that help maintain the module firmware and configuration.
Configuration
Summary
This option is used to save all the different Configuration pages onto one page for
easy viewing. Page can also be saved (using the File/Save As function on the drop
File Menu) for future reference, and emailing module configuration details to ELPRO
technical support in the event of any configuration problems.
TCP Throughput Test
Perform a throughput test. See “4.4 Throughput Test” for details.
Radio Path Test
Perform a radio path test without the use of a laptop and get a visual indication of
RSSI and throughput on the front panel LEDs.
Read Configuration
File
This option will show the module configuration in XML format. This file can be saved
for future reference.
Write Configuration
File
Any configuration XML files saved using the “Read Configuration” above can be
loaded back into the module.