Proxima ASA 7911 - Manual (Page 44)

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In order to establish communications, all Stations and the Master
must be configured with the same Domain number. Radios on
different Domains cannot communicate with each other. The
Domain is a software filter which does not affect the actual radio
frequency or the frequency hopping sequence.
You typically want to set each Serial Adapter in a given network
to the same Domain. However, if you have two sets of Serial
Adapters in two distinct pairs which you do not want to commu-
nicate with one another, you should set each pair to a different
Domain to avoid confusion.
The Domain is a number between 0 and 15. Choose “U” for Use
Switch in order to use the number specified by the Domain
Switch. The default setting is the Domain Switch value, which
is pre-configured to Domain 0 at the factory.
Note that while the Domain Switch allows the user to set the
Serial Adapter to operate on any Domain value between 0 and 8,
the software configuration menu allows the user to set the
Domain to a value between 0 and 15. Also, if you choose to
override the Domain Switch, the Pairing Domain feature, de-
scribed in Chapter 5, will not be operational.
While you may set the Domain number to 9 in the configuration
menu, choosing Domain 9 on the external rotary switch will
cause the Serial Adapter to enter the configuration menu at the
default parameters of 9600 bps and 8N1.
Note:
If the Serial Adapter is reset at any time while the
external rotary Domain Switch is set to 9, it will imme-
diately enter the configuration menu and will not be
ready for operation.