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Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual
23
Rev Version 2.19
When DFS is enabled, the access point (master device) goes through the following steps:
1. The master device that initiates communications selects a channel and monitors that channel for
potential radar interference for a minimum listening time of 60 seconds (channel availability check time).
No transmissions can occur during this period.
2. If interference is detected, the system selects another channel and repeats the channel availability check on
the new channel (the original channel is added to a list of channels with radar).
3. Once a channel has been selected and passes the channel availability check, the network starts to use that
channel.
4. While using the channel, the network’s master device continuously monitors for potential interference from
a radar source (this is referred to as “in-service monitoring”). If interference is detected, the network master
device issues commands to all other in-network devices to cease transmissions. The channel is added to the
list of channels with radar.
5. The master device then selects a new channel (one that is not on the radar list).
6. A channel that has been flagged as containing a radar signal (either by a channel availability check or by
in-service monitoring) is subject to a 30-minute non-occupancy period, during which time the channel cannot
be used by the device in order to protect scanning radars. The channel on the radar list will be purged once
the non-occupancy period has elapsed for that channel.
3.2 Configuring the Unit for the First Time
The 245U-E has a built-in Web server containing webpages for analyzing and modifying the module’s configuration.
The configuration can be accessed using Microsoft
®
Internet Explorer
®
version 7 or greater. This program is
shipped with Microsoft Windows
®
or may be obtained freely from the Microsoft website. If using other browsers,
make sure that they are fully compliant with IE7 SSL security.
NOTE Microsoft Internet Explorer Version 6 will not load webpages due to a compatibility issue between
IE6 and SSL-security websites.
Default Configuration
The default factory configuration of the 245U-E is as follows:
• Client/Bridge/.
• IP address 192.168.0.1XX, where “XX” is the last two digits of the serial number (the default IP address is
shown on the printed label on the back of the module).
• Netmask 255.255.255.0.
• Username is “user” and the default password is “user”.
The 245U-E will temporarily load some factory default settings if powered up with the factory default switch (on the
end-plate of the module) in SETUP position. The previous configuration remains stored in non-volatile memory and
will only change if a configuration parameter is modified and the change saved.
NOTE Wireless operation is disabled when in SETUP mode. Remember set the switch back to the RUN
position and cycle power at the conclusion of configuration for resumption of normal operation.
Accessing Configuration for the First Time
Because the default IP address is in the range 192.168.0.XXX, the unit may not connect to you network or PC.
There are two methods for accessing the configuration for the first time.
M
EThOD
1
: Change your computer settings so that the configuring PC is on the same network as the 245U-E with
factory default settings. This is the preferred method and is much simpler than the second method. You will need a
straight-through Ethernet cable between the PC Ethernet port and the 245U-E. The factory default Ethernet address
for the 245U-E is 192.168.0.1XX, where “XX” is the last two digits of the serial number (check the label on the back
of the module).
