Cisco aironet 1522 Design And Deployment Manual page 85

Figure 54
For the AP1524PS, the 4.9-GHz radio is independent of 5-GHz radio and is not used for the
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backhaul. On the AP1524PS, the 4.9-GHz band is enabled by default.
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• For AP1522s, you can enable the 4.9 GHz public safety band on the backhaul. This can only be done
at the global level and cannot be done on per mesh access point basis.
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• For public safety only deployments, the AP1522 and the AP1524PS must each be connected to its
own separate RAP-based tree. For such deployments, the 1522 must use the 4.9-GHz backhaul and
the1524PS must be in its own RAP tree and use the 5.8-GHz backhaul.
In some parts of the world including the US, you can only have public safety traffic on the 4.9-GHz
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backhaul. Check the destination countries compliance before installing.
The 4.9-GHz sub-band radio on the AP1524PS supports public safety channels within the 5-MHz
(channels 1 to 10), 10-MHz (channels 11-19), and 20-MHz (channels 20-26) bandwidths.
The following data rates are supported within the 5 MHz bandwidth: 1.5, 2.25, 3, 4.5, 6, 9, 12, and
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13.5 Mb/s. Default rate is 6 Mb/s.
The following data rates are supported within the 10 MHz bandwidth: 3, 4.5, 6, 9, 12, 18, 24, and
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27 Mb/s. Default rate is 12 Mb/s.
Those AP1522s with serial numbers prior to FTX1150XXXX do not support 5 and 10 MHz
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channels on the 4.9-GHz radio; however, a 20-MHz channel is supported.
Those AP1522s with serial numbers after FTX1150XXXX support 5, 10 and 20 MHz channels.
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Enabling the 4.9-GHz Band
When you attempt to enable the 4.9 GHz band, you get a warning that the band is a licensed band in most
parts of the world. (See
Cisco Aironet 1520, 1130, 1240 Series Wireless Mesh Access Points, Design and Deployment Guide, Release 6.0
OL-20213-01
AP 1524PS Diagram Showing Radio Placement
In Japan, 4.9 GHz is enabled by default as 4.9 GHz is unlicensed.
For client access on the 4.9 GHz band on the AP1522, one has to enable the feature universal
client access.
Figure 55.)
Connecting the Cisco 1520 Series Mesh Access Point to Your Network
85