Understanding 802.11ac and the option module
limited (for example 15.4W 802.3af power) the Access Point will come up with the radio module disabled until a suitable source of power is available such as enhanced PoE, 802.3at PoE+, Power Injector for or the Local Power Supply
Figure 65 Switches that support the AP 3600
Should the installer/administrator determine a need to power the module from a 15.4 Watt power source (perhaps it is a high density installation where there is plenty of 2.4 coverage) or the AP is being used to augment areas with 802.11ac where 2.4 coverage is already present – if so, the internal 2.4 GHz radio can be disabled allowing the AP 3600 with 802.11ac module to come up with full power and full functionality. We feel this is a significantly better approach allowing installers to perform full functionality site surveys @ 15.4W (802.11af) rather than compromising RF power and shutting down Spatial Streams and other ports.
Figure 66 Module powering options for low power 802.3af (15.4 Watts)
Because the module antennas are internal, the module radiates much like an AP 3600i would as there are no RF connectors on the module, so the antennas “appear” as they would on the internal models.
Cisco Aironet Series 1600/2600/3600 Access Point Deployment Guide, Release 7.5
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