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just a quick one...can i power 48 AP per switch...
Thanks and Regards
No you can't. WS-C3750E-48PD has a maximum of 740 watts. The AP 1252 series requires at most 18.0W. Besides, don't you want to think about redundancies?
Here's the product detail of the switch:
You may want to read about the power requirements for the Cisco Aironet 1250 Series Access Point here:
Does the response help?
Depends on your power supply. According to the product catalogue, there's a 1150W p/s for the 3750E available.