[cisco-voip] 8851 - power draw

[Lelio Fulgenzi]

Hi! Thanks for this. Your data matches up pretty good with the docs I see for the 8845. No need to grab the 8865. I’ve got one of those I’m looking at too. Power draw goes up with a sidecar. 4W by my records to 16.9W – which means no go on af only ports without power cube. Me thnks.




From: Charles Goldsmith <w at woka.us>
Sent: Friday, February 7, 2020 8:46 AM
To: Lelio Fulgenzi <lelio at uoguelph.ca>
Cc: voyp list, cisco-voip (cisco-voip at puck.nether.net) <cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] 8851 - power draw

I have a single 8845 here in my office, on a 2960 switch.  It was manufactured 09/19 per the box.  My 2960 is reporting it as a class 2 and it's drawing 7w with power/screen on.    Just to give you a bit more data.  I don't have an 8851 here.  My 8865 is on wifi and in the other office, but if you want correlating data, I can go grab it.  The 8845 is on 12.7, the 8865 is currently connected to Webex, so whatever code they push, I'd have to go look.

office-2960#sh power inline g1/0/8
Interface Admin  Oper (W)     Power   Device              Class Max
--------- ------ ---------- ------- ------------------- ----- ----
Gi1/0/8   auto   on         7.0     IP Phone 8845       2     30.0

Interface  AdminPowerMax   AdminConsumption
             (Watts)           (Watts)
---------- --------------- --------------------
Gi1/0/8               30.0                 15.4


On Thu, Feb 6, 2020 at 5:11 PM Lelio Fulgenzi <lelio at uoguelph.ca<mailto:lelio at uoguelph.ca>> wrote:

Does anyone have a bunch of 8851s deployed? Can I trouble you for a "show inline power" output? I'm looking for what normal operating power draw is for this model. No side cars, no USB, sort of thing.

I've got an 8865 showing 12.9W, and I'm hoping it's less. We're looking at selecting 8841 or 8851 and power draw is a concern. Startup too, but apparently, startup will cycle through.

Lelio

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