[SR-Users] Green VoIP - energy efficiency and performaces of v3.0

[Henning Westerholt]

On Wednesday 25 May 2011, Jeremya wrote:
> These figures pale into insignificance compared to the power required
> for standard SIP devices - typically 5-8 watts per device multiplied by
> the number of devices.
> 
> When you factor in Gigabit Ethernet the power ups significantly.
> 
> Optimisation at the server level is not significant on any scale.
> Optimisation on communications power: i.e. end-devices, DSL & switches
> is where the power savings are important.

Hi Jeremya,

you're right in this case - given the much higher number of CPE devices in the 
end user hands and especially as most of them use really cheap (also bad) 
power supplies. But in generally optimisations on a server level are also 
important, if you have a few thousand servers than even small amounts fast add 
up. And for the whole internet it already uses siginifcant part of the power, 
close to 10% in the US to some research:

http://hardware.slashdot.org/story/07/09/27/2157230/Internet-Uses-94-of-
Electricity-In-the-US

With regards to the research from Jan, the performance numbers are really 
impressive, great work! 

Cheers,

Henning