[cisco-voip] 7940 Power Save Mode

Thu Apr 1 17:18:06 EDT 2010

We did some testing with a Kill-A-Watt meter to help determine the actual
cost savings per switch.  For a 7940 phone that was shut off for 10 hours in
the evening hours, we would save about $.10 a phone per month at $.08/KWHR
on electricity.  Newer phones consume more Watts, but also cost more to
operate so the savings was about equal.

In some environments, this can probably add up quick.  However, this
particular environment is about 100 phones total so the $10/month
electricity savings is minimal.  It was interesting figuring it out though.
:-)

Has anyone else done a cost analysis on Energywise?  I'd be curious if my
numbers match up...

Brian

On Tue, Mar 23, 2010 at 3:47 PM, Wes Sisk <wsisk at cisco.com> wrote:

> We attached a Kill-A-Watt to the switch powering phones in an engineers
> cube.  When the EEM script triggers switch power consumption drops by
> ~100W.  x 15 engineers in our area that is turning off 15x100w bulbs for 12
> hours at a time.  The major impediment with that approach is the phones are
> hard down and do not respond to user input.
>
> A solution that that provides similar level of power consumption while
> enabling user intervention would be best of both worlds.  Save power, save
> on cooling, save backlights, extremely nominal user impact = win.
>
> /Wes
>
>
> On Tuesday, March 23, 2010 1:50:53 PM, Fuermann, Jason <JBF005 at shsu.edu><JBF005 at shsu.edu>wrote:
>
>  I guess the question really is, what is the end goal of putting the rest
> of your phones in power save some kind of power save mode?
>
>
>
> *From:* Chris Ward (chrward) [mailto:chrward at cisco.com <chrward at cisco.com>]
>
> *Sent:* Tuesday, March 23, 2010 12:22 PM
> *To:* Fuermann, Jason; Ryan Ratliff (rratliff); Matthew Loraditch
> *Cc:* cisco-voip at puck.nether.net; Jamie Weatherhead
> *Subject:* RE: [cisco-voip] 7940 Power Save Mode
>
>
>
> Energywise support is not yet available on our phones. You can use
> Energywise to shutdown switchports, but not put the phones to sleep… YET.
>
>
>
> When energywise is supported on the phones, it will have the ability to put
> them into a deep-sleep mode. It will however not be supported on the
> 7940/60s.
>
>
>
> +Chris
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>]
> *On Behalf Of *Fuermann, Jason
> *Sent:* Tuesday, March 23, 2010 10:53 AM
> *To:* Fuermann, Jason; Ryan Ratliff (rratliff); Matthew Loraditch
> *Cc:* cisco-voip at puck.nether.net; Jamie Weatherhead
> *Subject:* Re: [cisco-voip] 7940 Power Save Mode
>
>
>
> Sorry, I was thinking of EnergyWise, not EEM
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>]
> *On Behalf Of *Fuermann, Jason
> *Sent:* Tuesday, March 23, 2010 9:43 AM
> *To:* 'Ryan Ratliff'; Matthew Loraditch
> *Cc:* cisco-voip at puck.nether.net; Jamie Weatherhead
> *Subject:* Re: [cisco-voip] 7940 Power Save Mode
>
>
>
> I’m sure EEM has some interface a standard user could interact with
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>]
> *On Behalf Of *Ryan Ratliff
> *Sent:* Tuesday, March 23, 2010 9:42 AM
> *To:* Matthew Loraditch
> *Cc:* cisco-voip at puck.nether.net; Jamie Weatherhead
> *Subject:* Re: [cisco-voip] 7940 Power Save Mode
>
>
>
> You telnet in to the switch and do a 'no shut'.  We control the switches
> here in our cubes that power all of the phones.
>
>
>
> -Ryan
>
>
>
> On Mar 23, 2010, at 10:31 AM, Matthew Loraditch wrote:
>
>
>
> How does that work if you need to work late or come in on off hours ?
>
>
>
>
>
> *Matthew Loraditch, CCNA, CCDA*
> 1965 Greenspring Drive
>
> Timonium, MD 21093
> support at heliontechnologies.com
> (p) (410) 252-8830
> (F) (443) 541-1593
>
> Visit us at www.heliontechnologies.com
> Support Issue? Email support at heliontechnologies.com for fast assistance!
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>
> ] *On Behalf Of *Wes Sisk
> *Sent:* Tuesday, March 23, 2010 10:27 AM
> *To:* Matthew Ballard
> *Cc:* cisco-voip at puck.nether.net; Jamie Weatherhead
> *Subject:* Re: [cisco-voip] 7940 Power Save Mode
>
>
>
> We implement an alternate powersave method on the phones at our desks. We
> use EEM script on switch to shutdown power to all non-critical phones
> outside business hours.  EEM script is available in the EEM script
> repository on Cisco.com <http://cisco.com/>.
>
> /Wes
>
> On Monday, March 22, 2010 12:48:36 PM, Matthew Ballard <mballard at otis.edu><mballard at otis.edu>
>  wrote:
>
> The only reason the 7970 would need a power save mode is to turn off the
> backlight.  Since the 7940 doesn’t have a backlight, a power save mode would
> save little to no power anyways.
>
>
>
> Matthew Ballard
>
>
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [
> mailto:cisco-voip-bounces at puck.nether.net<cisco-voip-bounces at puck.nether.net>
> ] *On Behalf Of *Jamie Weatherhead
> *Sent:* Monday, March 22, 2010 9:42 AM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] 7940 Power Save Mode
>
>
>
> Afternoon all,
>
>
>
> Is it at all possible to set a 7940 phone to power save mode?
>
>
>
> I am able to achieve this for a 7970 phone by adjusting the ‘Display Idle
> Timeout’ setting on the phone device configuration page. However, the 7940
> phone doesn’t appear to have these settings as seen below:
>
> <image001.png>
>
> Any help would be appreciated.
>
>
>
> Jamie
>
>
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