Hi, it depends per model
How many devices depends on how much poe power is available and on how much power a device wants.
show power inline
Module Available Used Remaining
(Watts) (Watts) (Watts)
------ --------- -------- ---------
5 420.0 275.0 145.0
In this 3750-E switch i have 420 watts available
i use access points which consume 15,4 watts each and ip phones which consume 6 watts each
So i could hook up a total of 27 access points *15,4 = 415,8 watts
When using a combination of devices with different power consumption, some calulation needs to be done
Hooking up 10 phones would be 60 watts plus hooking up 10 access points would be 154 watts, with a total of 214 watts, 206 watts remaining