GS748TP switch poe question

Ish · 14 Jan 2016 at 17:27

Hi

The Netgear GS748TP switch has 384w of poe available. Is this split euqally between each port eg. 8w per port or can some ports use more and some less?

#Chri5# · 14 Jan 2016 at 19:45

Normally it's a "budget" and delivered on a first-come, first-served basis. So you could run out of power before you run out ports. If devices can tell the switch they need a lower power (802.3af supports 3 or 4 type of class), the budget can go further.

Ish · 15 Jan 2016 at 09:35

Thanks. That is what I thought but just needed it confirming.

Armageus · 15 Jan 2016 at 09:57

Per the manual it's a maximum of 15.4W per port at the highest PoE class (class 3 or undefined), so in theory you could run out of power budget with only 25 Ports.

GS700TP Manual said:
Class – Displays the classification of the powered device. The class defines the maximum
power that can be provided to the powered device. The possible field values are:
– Class 0 – The maximum power level at the Power Sourcing Equipment is 15.4 Watts.
– Class 1 – The maximum power level at the Power Sourcing Equipment is 4.0 Watts.
– Class 2 – The maximum power level at the Power Sourcing Equipment is 7.0 Watts.
– Class 3 – The maximum power level at the Power Sourcing Equipment is 15.4 Watts.
– Class 4 – Treated as Class 0

source:
http://www.downloads.netgear.com/files/GS700TP_UM_08May08_.pdf