Cooper Bussmann BU-245U-E 3.1 Selecting a Channel

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Cooper Bussmann BU-245U-E Wireless Ethernet & Device Server User Manual

Clients can roam within a system however if the link to the Access Point fails or the radio signal level becomes too weak it will scan for beacons

and connect to an Access Point (provided the SSID and any Encryption methods, keys,etc are compatible). If there are multiple Access Points it

will select the connection with the best signal level.This functionality permits a client to have mobility whilst maintaining a link with the most

suitable AP.

The following table details the status of the indicating LEDs on the front panel under normal operating conditions.

LED Indicator Condition Meaning

OK GREEN Normal Operation

OK Flashing RED / GREEN Module Boot Sequence

Radio RX GREEN flash Radio receiving data (Good Signal Strength)

Radio RX RED flash Radio receiving data (Low Signal strength)

TX/LINK GREEN Radio Connection Established

TX/LINK RED Flash Radio Transmitting

RS-232 GREEN flash Data sent from RS-232 Serial Port

RS-232 RED flash Data received to RS-232 Serial Port

LAN ON Link Established on Ethernet port

LAN Flash Activity on Ethernet port

RS-485 GREEN flash Data sent from RS-485 Serial Port

RS-485 RED flash Data received to RS-485 Serial Port

DIO GREEN Digital Input is grounded

DIO RED Digital Output is active

DIO Off Digital Output OFF and Input is open circuit

The Ethernet RJ45 port incorporates two indication LEDs.The LINK LED comes on when there is a connection on the Ethernet port, and will blink

off briefly when activity is detected on the Ethernet Port.The 100MB LED indicates that the connection is at 100 MBit/Sec. The 100MB LED will

be off for 10MB/Sec connection.

Other conditions indicating a fault are described in Chapter Four - DIAGNOSTICS.

3.1 Selecting a Channel

The BU-245U-E-G conforms to the IEEE 802.11b/g Wireless LAN specification.The BU-245U-E-G supports 13 x 20MHz, 12 x 10MHz and 13 x

5MHz radio channels in the 2412MHz to 2482MHz frequency range. Channels are country or region specific. Please check your local regulatory

body for compliance and channel selection.

You can see from the diagram below there are a limited number of channels available in the 2.4GHz frequency range.Care must be taken when

selecting an operating channel as some of the channels overlap.

The 20M channels have a separation of 5MHz which means there is some overlap into

the next channel, i.e.,channel 1 will overlap into channel 2, 3 and 4; channel 6 will

overlap into channels 3, 4,5, 7, 8 and 9. If complete separation is required then you can

use channels 1, 6 and 11 without any interference between the channels.

3A1576Rev1.6