User's Manual

25
throughput supported by the network. In addition, the overlap-
ping cells offer redundancy of coverage required in networks
where downtime is not tolerable.
Each Harmony OpenAir Access Point within a roaming net-
work must have a unique Channel/Subchannel pair, but all must
have the same Domain number and Security ID. Mobile clients
are equipped with OpenAir client adapters that are also set to
the same Domain and Security ID.
As the mobile client seamlessly switches from cell to cell, its
network connectivity is preserved.
The user can move freely between the OpenAir Access Points in
the network. When the roaming client leaves the transmission
range of one OpenAir Access Point, the software automatically
polls the other OpenAir Access Point(s) in the same Domain to
continue the network connection.
See Figure 5 for an example of a network set up with a roaming
Domain. In addition, Harmony OpenAir Access Point can be
installed on different IP subnets from the AP Controller so that
mobile users can roam across routers. For more information on
the Harmony AP Controller and Access Points, refer to the
Harmony Access Point Controller Model 7560 User’s Guide.
The cells must overlap to ensure that there are no gaps in
coverage so that the mobile client will always have a connec-
tion available.
Note:
Mobile devices will only roam among OpenAir Access
Points with the same Domain and Security ID.