Cisco BR1400 Deployment Manual page 4

1.2.3 Power Levels
The UNII-2 band is intended for wireless bridging both for indoor applications as well as short
range outdoor applications. UNII-3 band, with far greater transmit power and antenna gain
allowances is preferable for long range outdoor wireless bridging.
To facilitate this, the regulations allow for connectors and the use of cable and auxiliary antennas for
both of these bands. The effective radiated power allowed in UNII-3 band is 4 watts (36 dBm),
which is much more than the radiated power of 1 watt (30 dBm) allowed in UNII-2 band. Rather,
the UNII-2 band is treated by the Wi-Fi community as being a less-restrictive extension of the
UNII-1 band generally supporting clients and Access Points.
The channel numbers corresponding to the four centre frequencies for UNII-3 band are 149,153,
157 and 161.
Regulatory Domain Frequency Band
USA
Channel Numbers for UNII-3 Band
Table 1.
The maximum antenna gain allowed is 6dBi. The transmit power may be reduced to accommodate
higher gain, more directional antennas while staying within the EIRP limits for a particular band. This
is explained in detail, later in this section.
5.15
5 GHz UNII
Band
Conducted Power
Antenna
Gain
Radiated
Power
UNII-1:
UNII-2:
UNII-3:
Copyright © 2004 Cisco Systems, Inc. All rights reserved.
UNII middle band
5.725-5.825 GHz
5.25
5.35
4Channe 4Channe
ls UNII-1 ls UNII-2
40mW 250mW
(16dBm (24dBm
) )
6dB 6dB
i i
22dB 30dBm
158mW m 1 W
Indoor Use, antenna must be fixed to the radio
Indoor/Outdoor Use, fixed or remote antenna
Primarily used for Outdoor Bridging
Page 4 of 53
Channel number
149
153
157
161
5.725
Centre frequencies
5.745 GHz
5.765 GHz
5.785 GHz
5.805 GHz
4Channe
ls UNII-3
1W
(30dBm
)
6dB
i
36dBm
4W