Dell SonicPoint ACi Getting Started Guide
10
To allow multiple separate wireless networks in a shared and confined space, the RF medium is divided into channels. For devices
in the 5 GHz range (802.11a/n/ac), this means the possibility of up to 23 discrete channels.
For devices using the 2.4 GHz range (802.11b/g/n), the wireless space is limited to a maximum of 14 overlapping channels. As a
result of these overlapping channels, 2.4 GHz technology provides only a total of three discrete channels.
802.11 comparison chart
Table 3. 802.11 signal characteristics
802.11a
802.11b
802.11g
802.11n
802.11ac
# of Channels in USA
23
11
11
11
21
# of Channels in EU
23
13
13
13
16
# of Channels in Japan
15
14
14
14
19
Frequency Band
5 GHz
2.4 GHz
2.4 GHz
2.4/5 GHz
5 GHz
Max. Data Rate
54 Mbps
11 Mbps
54 Mbps
450 Mbps (For 3X3
MIMO)
1.3 Gbps (For
QAM-64, MIMO
3X3, and 80 MHz
channels)
Radius (Range)
90ft/25m
120ft/35m
120ft/35m
300ft/90m
120ft/35m
NOTE:
Although 802.11b/g/n standards provide between 11 and 14 channels, only three of those channels are fully discrete
(non-overlapping) channels.
