[cisco-voip] 802.3at and the 9971 / VXC 2112

[Ryan Ratliff]

What CUCM are you running?  The parameter Adam mentioned is called "Power Negotiation" and should be present on the phone page in CCMAdmin.

> You should enable the Power Negotiation feature when connected to a switch that supports power negotiation. However, if a switch does not support power negotiation, then you should disable the Power Negotiation feature before you power up accessories over PoE. When the Power Negotiation feature is disabled, the phone can power up accessories up to 12.9W    

-Ryan

On Jan 17, 2012, at 5:20 PM, Mike King wrote:

I'm currently running sip9971.9-2-2

But I'm not sure how that helps me.  :-)

On Tue, Jan 17, 2012 at 4:18 PM, Adam Frankel (afrankel) <afrankel at cisco.com> wrote:
With the fix for CSCtl08010, you should be able to disable power negotiation at the device/common/enterprise level in CUCM.

You also need 9.1(1) or newer firmware.

Adam


From: Mike King <me at mpking.com>
Sent: Tue, Jan 17, 2012 2:49:36 PM

To: Cisco VoIPoE List <cisco-voip at puck.nether.net>
CC: 
Subject: [cisco-voip] 802.3at and the 9971 / VXC 2112

> We have a 9971 phone with the VXC 2112 backpack, and we've connected it to one of our Juniper switches that provide 802.3at power. 
> 
> However the backpack (or the camera) does not appear to work with it. (Works fine with the power cube)
> 
> Is there anything we have to do to enable PoE Plus (802.3at)?  I know the switch is providing it. (Its registering it as a class 4 device, but the phone is only drawing 7.4W, out of a Max of 30W)
> 
> Mike
> 
> 
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