Bridge GUI Guide: Network Configuration
59
When
Country
is licensed on the Bridge (Section 6.3),
additional countries are available for selection.
To allocate bandwidth and prevent interference, radio
transmission is a regulated activity, and different countries
specify hardware configurations and restrict the strength of
signals broadcast on particular frequencies according to
different rules.
While some countries develop such regulations independently,
national regulatory authorities more often adopt an established
set of rules in common with other countries in the same region.
Whether used in common by multiple countries or by a single
country, a
regulatory domain
is distinguished by a single set of
rules governing radio devices and transmissions.
In order to comply with the relevant regulatory authority, you
must establish the Bridge’s regulatory domain by identifying the
country in which the Bridge will operate. Bridge software
automatically filters the options available for individual radio
settings (Section 3.3.2) according to the requirements of the
relevant regulatory domain as they apply specifically to the
Bridge’s internal radios.
In some of the countries on the default
Country Code
list, radios
using the 802.11a frequency band will have
no
compliant
channels available unless
Advanced Radio
operation has been
licensed on the Bridge. (Refer to Section 3.3.2 for more detail
on radio operation with and without an
Advanced Radio
license
and to Section 6.3 for licensing information.)
By default, the
United States
is selected as the Bridge’s country
of operation, and the rules of the Federal Communication
Commission (FCC) regulatory domain dictate available radio
settings in the 5 GHz 802.11a and the 2.4 GHz 802.11g
frequency bands.
The 4.400 GHz–4.750 GHz frequency range is regulated by
the United States Department of Defense, rather than by the
FCC.
Use of military band radios is strictly forbidden outside of
U.S. military applications and authority.
On a Bridge with one or
more 4.4 GHz radios installed,
United States
is selected as the
Bridge’s country of operation and the setting cannot be
changed.
3.3.1.4
Environment Setting
It is common for regulatory domains to restrict certain channels
to indoor-only use. In order for the Bridge’s radio(s) to comply
with such requirements, you must specify whether the Bridge is
operating
Indoors
or
Outdoors
(the default).
