How many CP-7975G phones supported via the 8 built-in POE ports?

Unanswered Question
Nov 15th, 2007

How many CP-7975G phones supported via the 8 built-in POE ports? I know that these are new phones, and haven't passed the certification tests yet, but has anyone internally at least try this in the lab hooking up 8 x 7975G phones to see if the UC520 can handle the POE load?

Thanks guys...

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rob.huffman Fri, 11/16/2007 - 07:27

Hi Syrus,

According to all the specs involved with these two products, all 8 PoE ports should be able to support the 7975G.

Q. What is the maximum power per port supported on the Cisco Catalyst Express 520 Series Switches?

A. The Cisco Catalyst Express 520 PoE models can support up to 15.4W per port. There is no need to do creative power budgeting or worry about exceeding the power limit or adding an external power shelf.

Q. What phones are supported on the Cisco Unified Communications 500 Series?

A. The Cisco Unified Communications 500 Series runs Cisco Unified CME 4.2 and therefore supports all Cisco Unified IP phones, including Cisco IP Communicator, the Cisco Unified IP Phone 7931G and 7985G models, and the Cisco Unified Wireless IP Phone 7921G.

IP Phone 7975G;

Call Control compatibility

Supported in Cisco Unified Communications Manager Versions 4.1(3)sr5b, 4.2(3)sr2b, 4.3(1), 5.1.1(b), 5.1(2), 6.0(1) and greater

Supported in Cisco Unified Communications Express and SRST Version 4.1

Hope this helps!


Maulik Shah Fri, 11/16/2007 - 17:27

For the 7975G phones - the max on the built in POE is 5 phones at a time. The 7975Gs are supported on the UC520.


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