Cisco Cisco Aironet 340 Ethernet Bridges Guia Do Utilizador

A clear line of sight must be maintained between wireless bridge anten-
nas. Any obstructions may impede the performance or prohibit the abil-
ity of the wireless bridge to transmit and receive data. Directional 
antennas should be placed at both ends at appropriate elevation with 
maximum path clearance.

The Aironet 340 Series Bridge employs Spread Spectrum Technology, 
previously developed for military “anti-jamming” and “low probability 
of intercept” radio systems. 

The Aironet 340 Series Bridge must be set to the same System Identifier 
(SSID) as all other Aironet devices on the wireless infrastructure. Units 
with a different SSID will not be able to directly communicate with each 
other. 

When configuring your system, and when reading this manual, keep in 
mind the following terminology:

Infrastructure – The wireless infrastructure is the communications sys-
tem that combines Aironet bridges, mobile nodes and fixed nodes. Airo-
net bridges within the infrastructure can be either root units, which are 
physically wired to the LAN backbone, or can act as wireless repeaters. 
Other RF enabled devices serve as fixed nodes or mobile nodes. 

Root Unit – The root unit is an Aironet bridge that is located at the top, 
or starting point, of a wireless infrastructure. The root bridge is usually 
connected to main wired backbone LAN. Since the radio traffic from the 
other bridges LANs will pass through this unit, the root unit is usually 
connected to the LAN which originates or receives the most traffic

Repeater – A repeater is an Aironet bridge that establishes a connection 
to the root bridge or another repeater bridge to make the wired LAN to 
which it is connected part of the bridged LAN.

End Node – A radio node that is located at the end of the network tree.