Cisco AIR-BR1410A-A-K9 - Aironet 1410 Wireless Bridge Deployment Manual page 5

Conducted and Radiated Power Levels in UNII-1,2 & 3 Bands

Figure 3.

Wireless systems are certified as complete systems. In the US, the FCC requires that all antennas

sold by a Wireless vendor be certified with the radio with which they are to be sold. Cisco Aironet

systems are tested and certified for each country using Cisco Aironet components. If amplifiers or

third party antennas are used, then it is likely the entire system must be recertified. Systems

integrators and installers are responsible for FCC compliance or recertification when using third

party equipment.

1.2.4 Other Regulatory Domains

In addition to FCC, other main regulatory domains for operation in 5GHz are European

Telecommunications Standards Institute (ETSI), Japan, China (Mainland China), Israel, Singapore

and Taiwan (Republic of China).

Check the Cisco web site for compliance information and also with your local regulatory authority

on what is permitted within your country.

http://www.cisco.com/warp/public/779/smbiz/wireless/approvals.html

ETSI recommended frequency band for bridging is 5.470 to 5.725 GHz offering almost eleven

channels with the same EIRP rules as FCC. In exchange of this wide spectrum, the ETSI

recommendation mandates the inclusion of two features not currently found in 802.11 products,

Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC). DFS and TPC are the

two functions handled quite well by the HyperLAN2 specification. The IEEE 802.11h standard

covers both DFS and TPC that will apply to the 5 GHz band at a later date.

1.2.5 FCC Regulations regarding EIRP limitations with Point-to-Point & Point-to-

Multipoint Wireless Networks

Wireless bridges can be deployed to establish a direct link between two sites. The network traffic

between the two sites is bridged or forwarded to the other bridge, as if were one network. This is

called a point to point link.

Point-to-multipoint wireless links are an expansion of the point-to-point link in which one

centralized bridge can establish multiple point-to-point links. Using point-to-multipoint connection,

multiple remote sites such as buildings can be linked together into a single logical network. In a

point-to-multipoint architecture, these remote sites are linked to a single root bridge at a centralized

site.

For point-to-multipoint UNII-3 systems, the directional antenna of 6 dBi gain can be used. And if

gain is greater than 6 dBi then the peak transmit power of the device has to be reduced by amount

in dB the directional antenna gain exceeds 6 dBi.

Copyright © 2004 Cisco Systems, Inc. All rights reserved.

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