Руководство По Проектированию для Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter
3-2
Enterprise Mobility 4.1 Design Guide
OL-14435-01
Chapter 3 WLAN Radio Frequency Design Considerations
RF Basics
standard. For example, the emission requirements for WLAN to minimize the amount of interference a
radio can generate or receive from another radio in the same proximity. It is the responsibility of the
vendor to get the product certified from the relevant regulatory body.
radio can generate or receive from another radio in the same proximity. It is the responsibility of the
vendor to get the product certified from the relevant regulatory body.
summarizes the current
regulatory domains for Wi-Fi products. The main regulatory domains are FCC, ETSI, and the MKK.
Besides following the requirements of the regulatory agencies, many vendors also ensure compatibility
with other vendors through the Wi-Fi certification program (
with other vendors through the Wi-Fi certification program (
).
For a complete listing of other countries’ regulatory transmit power settings and allowed frequency use,
see the following URL:
see the following URL:
http://www.cisco.com/en/US/products/ps6305/products_configuration_guide_chapter09186a008059c9
6f.html
6f.html
1
The regulations of Singapore and Taiwan for wireless LANs are particular to these countries only for operation in the 5 GHz
band. Singapore and Taiwan are therefore only regulatory domains for 5 GHz operation; for operation in 2.4 GHz, they fall into
the ETSI and FCC domains, respectively.
the ETSI and FCC domains, respectively.
Note
See the Cisco website for compliance information and also check with your local regulatory authority to
find out what is permitted within your country. The information provided in
find out what is permitted within your country. The information provided in
and
should be used as a general guideline. For up-to-date information on which Cisco products meet regional
requirements, see the following URL:
requirements, see the following URL:
Operating Frequencies
The 2.4 GHz band regulations have been relatively constant, given the length of time it has been
operating. The FCC allows for 11 channels, ETSI allows for up to 13 channels, and Japan allows up to
14 channels, but requires a special license to operate in channel 14.
operating. The FCC allows for 11 channels, ETSI allows for up to 13 channels, and Japan allows up to
14 channels, but requires a special license to operate in channel 14.
For 802.11a, countries are moving to open the frequency range 5.250–5.350 GHz (UNII-2) and the
frequency range 5.470 to 5.780 GHz for additional 802.11a channels. These various frequencies are
covered in more detail in the specific 802.11 sections in this chapter.
frequency range 5.470 to 5.780 GHz for additional 802.11a channels. These various frequencies are
covered in more detail in the specific 802.11 sections in this chapter.
Table 3-1
Regulatory Domains
Regulatory Domain
Geographic Area
Americas or FCC (United States Federal
Communication Commission)
Communication Commission)
North, South, and Central America, Australia
and New Zealand, various parts of Asia and
Oceania
and New Zealand, various parts of Asia and
Oceania
Europe or ETSI (European
Telecommunications Standards Institute)
Telecommunications Standards Institute)
Europe (both EU and non EU countries),
Middle East, Africa, various parts of Asia and
Oceania
Middle East, Africa, various parts of Asia and
Oceania
Japan (MKK)
Japan
China
People’s Republic of China (Mainland China)
Israel
Israel
Singapore
1
Singapore
Taiwan
1
Republic of China (Taiwan)