Proxima ASA 7911 - Manual (Page 43)

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Note that changes to these parameters will not take effect until
either the radio or the Serial Adapter is reset.
A RangeLAN2 Serial Adapter may be set as either a Master or a
Station using the Station Type parameter within the configura-
tion menu. You may also choose “U” for Use Switch to use the
value specified by the Station/Master Switch. The rotary switch
is set to Station by default.
Proxim’s RangeLAN2 products are frequency hopping spread
spectrum radios which communicate in the 2.4 GHz frequency
band. This means that several times every second, the frequency
at which the units are communicating changes.
In order for the units to communicate, in each subnetwork there
must be one unit that coordinates the frequency hops. This unit
is called the Master. It might help you to think of the Master as
the conductor of a frequency hopping orchestra. The Master
keeps time so all units know when to hop and to what frequency.
Units classified as Stations synchronize to the Master and follow
its signal to learn what frequency in the pattern the Master is
currently using.
There must be at least one unit in a given topology designated
the Master. When using two units in a Point-to-Point topology,
one RangeLAN2 Serial Adapter will be the Master and the other
will be set as a Station. In a Point-to-Multipoint topology, there
will be one Master and all other units are configured as Stations.
However, if you are using a topology that connects a
RangeLAN2 Serial Adapter to a RangeLAN2 Access Point, the
RangeLAN2 Access Point will be the Master and each Serial
Adapter should be set as a Station.