The TRE0921 Ethernet Transceiver allows a user to create a long-range, wireless Ethernet network with up to 16 Subscriber Units per Access Point. The basic network consists of two radios, one of which is designated as the Access Point (AP), and the other as a Subscriber Unit (SU). The TRE0921 Ethernet Transceiver Basic Kit contains two radios, preconfigured for immediate use.

In order to configure a wireless network using the TRE0921, the following the six elements must be established:

• One transceiver must be designated as an Access Point (AP).
• All other transceivers in the network must be designated as Subscriber Units (SU), and each SU must have a unique ID number.
• The number of Subscriber Units in the network must be indicated in the Access Point.
• The AP and all of the SUs must operate on the same radio frequency. This may be set manually or allowed to change automatically.
• All transceivers in the network must have the same Network Name (which is an 8-digit hexadecimal key).
• All transceivers in the network must share a common 128-bit Encryption Key.

TRE0921 Ethernet Transceiver may be used in multiple wireless networks as long as all of the elements above have been established for each separate network. If two AP units are very close to one another, they may interfere if operating on adjacent frequency channels. They must be placed at least 10 feet apart, or non-adjacent channels must be selected for their operation. Also, any SU should be placed at least 10 feet from the AP to avoid overloading the transceiver’s receiver.

The Access Point (AP) can be set to automatically scan for the best of the 12 available radio frequency channels, encrypt Ethernet data received from the network, and transmit it wirelessly to the correct Subscriber Unit (SU). The AP is constantly monitoring the radio link and can automatically change the channel if performance is degraded due to interference. On the other hand, the units may be manually set to a fixed channel.

Any 10/100 BaseT Ethernet client device (ECD) can be connected to a TRE0912 SU. Each SU encrypts Ethernet traffic received from the attached ECD and transmits the data wirelessly to its AP. Each SU can be plugged directly into an ECD without adding drivers or loading software. Essentially, once the AP/SU pair is configured and running, it behaves like a continuous Ethernet cable. The transceivers use standard TCP/IP protocol which performs error checking and correction automatically.

The TRE0921 uses the following frequency channels.