PoE requirements for 7940E phone

[ryoung1000]

What is the power wattage requirement for the 7940E phone. We have 3560-48 port switches with PoE. I thoutht the phone used 7.4 watts, but I cannot connect more then 24 phones.

[Rob Huffman]

Hi Rich,

Can you have another look at the phone model (I'm not sure what a 7940E is)? It sounds like whatever phone you are using must be a Class 3 device which requires 15.4 Watts. Here is an excerpt from a good doc on 3560-48 switches;

"Taking advantage of Cisco Catalyst Intelligent Power Management, the 48-port PoE configurations can deliver the necessary power to support 24 ports at 15.4W, 48 ports at 7.7W, or any combination in between."

PoE

• Maximum power supplied per port: 15.4W

• Total power dedicated to PoE: 370W

Here is a link to the actual doc;

http://www.cisco.com/en/US/products/hw/switches/ps5528/products_data_sheet09186a00801f3d7d.html

I do know that the 7941G-GE and the 7961G-GE are class 3 devices and would work as you have described with the 3560-48 switch.

Hope this helps!

Rob

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