Ap 2800 And Ap 3800 Powering Options - Cisco aironet 2800 series Deployment Manual

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C H A P T E R

AP 2800 and AP 3800 Powering Options

With each advance in wireless technology, access points are increasing in the number of radios, processing
power and memory. In 2001 the AP-350 Access Point had one 2.4 GHz radio and processor requiring only
6 Watts of power. These early PoE access points would fully function using the earlier 802.3af (15.4W)
powering systems developed in 2000-2003.
Figure 43: Early AP-350 used 6 Watts-Newer AP 3800 requires 802.3at or PoE+
Later PoE standards have since emerged with 802.3at providing up to 30 Watts at the Power Sourcing
Equipment (PSE). Many of Cisco's previous access points such as the AP-1850 and AP-3700 worked best
with the higher power sources 802.3at and PoE+ but would function with "reduced functionality" if powered
by the older 802.3af 15.4W powering systems.
With the introduction of the XOR radio along with more advanced features, it simply is not feasible to run
these higher performance access points on the older legacy 802.3af (15.4W) powering systems. Customers
who have such older systems should upgrade to 802.3at (30W) PoE equipment or systems that support uPoE
for best performance or use a different power source such as a mid-span injector or local power supply. Note:
Cisco Aironet Series 2800/3800 Access Point Deployment Guide
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