Proxim RangeLAN 802 8520 User Manual page 20

RangeLAN802
8520
RangeLAN802 8400
Each RangeLAN802 Access Point within a roaming network must be configured on a
unique Hopping Pattern, but all must have the same ESSID and Encryption Key (if
Security is enabled). The portable PCs, shown in Figure 7 above, are equipped with
RangeLAN802 8400 Cards which are also set to the same ESSID, unless the
RangeLAN802 clients are configured to associate with "Any" ESSID. In addition, the
RangeLAN802 8400 Cards must have the same Encryption Key as the Access Points (if
Security is enabled). As the portable PC seamlessly switches from cell to cell, its net-
work connectivity is preserved.
The user can move freely between the RangeLAN802 Access Points in the network.
When the roaming PC leaves the transmission range of one RangeLAN802 Access
Point, the software automatically polls the other RangeLAN802 Access Points with the
same ESSID to continue the network connection.
Note that the cells must overlap to ensure that there are no gaps in coverage, and
that the roaming PC will always have a connection available.
RangeLAN802
8520
RangeLAN802 8400
Figure 8
Roaming
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RangeLAN802
8520