Proxim HRFCF1 Manuale Utente

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Each OpenAir Master can select one of 15 Channels (designated
1 through 15) to establish communications with Stations.  Each
Channel number refers to a unique frequency hopping pattern
that allows multiple subnetworks to coexist in the same air
space providing a greater data rate transmission capability.
Each Channel is at a different frequency at a different time.  For
networks with multiple Masters (like in a roaming environ-
ment), each Master should use a different channel for optimal
performance.

In the event that a network has more than 15 Access Points in
the same area (and have therefore run out of independent Chan-
nels), an OpenAir Master uses a Subchannel number so that
Stations can easily distinguish between Access Points config-
ured for the same Channel.  The Subchannel is a software code
that is appended to each radio packet.  There are 15
Subchannels, designated 1 through 15.  Unlike the Channel, the
Subchannel has no effect on the frequency hopping pattern; it
merely allows the Stations to stay synchronized to the correct
Access Point.

A Station receives its Channel and Subchannel assignment from
the Master to which it is synchronized.  Therefore, you cannot
set the Channel number on an OpenAir CompactFlash Card
because the card is always configured as a Station.

Refer to the user’s guides that came with your other OpenAir
products for information on how to configure Channels and
Subchannels.