Transmit Rate; Wired Equivalent Privacy - Proxim 7550 Manual

Transmit Rate

The IEEE 802.11b specification supports four data rates: 11
Mbps, 5.5 Mbps, 2 Mbps, and 1 Mbps. As a mobile client
travels further and further away from an 802.11b Access Point
(in Infrastructure mode) or from other 802.11b nodes (in Ad Hoc
mode), the data rate automatically decreases in order to maintain
a usable radio connection.
In an Infrastructure network a client that is close to an Access
Point may operate at 11 Mbps, but a client that is far away from
the Access Point may operate at 2 Mbps.
By default, the Harmony 802.11b PC Card automatically adjusts
the data rate. However, you can manually configure the PC Card
to operate in 11 Mbps mode only, 5.5 Mbps mode only, 2 Mbps
mode only, and 1 Mbps mode only. In addition, to be compat-
ible with existing 2 Mbps 802.11 solutions, you can configure
the PC Card to automatically switch between 2 Mbps and 1
Mbps as necessary.
For example, if your application requires that the Harmony PC
Card maintains an 11 Mbps data rate, you can configure it to
operate in 11 Mbps mode only. In an Infrastructure network, an
Access Point and the PC Card will always attempt to operate at
11 Mbps, but this may greatly reduce the size of the coverage
area provided by the Access Point. Once the PC Card moves
outside the range that provides 11 Mbps operation, the PC Card
will lose connectivity with the network.

Wired Equivalent Privacy

The IEEE 802.11b standard specifies an optional encryption
feature, known as Wired Equivalent Privacy or WEP, that is
designed to provide a wireless LAN with a security level equal
to what is found on a wired Ethernet network.
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