[cisco-voip] 7940 back light ARG!

[Robert]

On Fri, 2007-11-30 at 11:51 -0500, Wes Sisk wrote:
> Views expressed here are strictly my own and no reflection on Cisco.
> 
> Interesting thread and thoughts. I'm curious of your take on a few
> things:

Good place to take the thread!

> 1) Ergonomics - If user's can't see phone screen how can they read
> documents?

In my particular case, almost everything is on my PC, so paper documents
are rare. Honestly, even paper documents I get are often scanned to PDF
for other reasons, and I tend to read it there! Obviously, the accounts
payable department will have different needs.

> 2) Power consumption from the green angle. More efficient to light
> environment with phone or with a lighting appliance/fixture?

I would imagine that the electroluminescent foil from the hardware hack
link I posted probably draws less power than the halogen bulb on a
dimmer. BTW, the resistance of a light bulb filament goes up as it gets
hotter (brighter), so though I don't have the exact figures at hand, a
filament bulb at 50% brightness does not draw 50% less power, though it
does draw less than 100%.

> 3) Power delivery.  Light on phone = more power consumption = bigger
> switches or bigger power supplies in switches.  Upgrade network
> infrastructure to light the user desktop?

In *my*  offices, I generally have much more switch than is needed, but
obviously that will not always be the case.

Along the same lines, I wish there was enough power on a switchport to
drive a 7914. Phones so equipped are frequently victims of reset-related
issues in our offices because not all of our office are on first tier
network providers.

> 4) Premium for 'Cisco Unified Desktop Lighting', CUDL, (not a real
> product!) vs. wpr/facilities installing light or occasional user desk
> lamp or USB light.

"Cuddle" for end users? :)

Robert