The reliance on USB and computer support of an adapter for voip pstn
combining. uses more energy than the :
cost of the adapter
than the amount you can save on your voip calling plan!

a usb port ad cpu use >420 watts.. fugre out that you pay $0.016 per KWH
you pay over one e daollr per day in power more in commercial setting
where peak power charges are incurred.

A review suggests how much power is used here.............

[url]http://reviews.ebay.com/Billions-energy-savings-avoid-USB-powered-VOIP-adapter_W0QQugidZ10000000003599864[/url]


A non usb pstn voip pstn adapter is located here

[url]http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=020&sspagename=STRK%3AMESE%3AIT&viewitem=&item=300111295431&rd=1&rd=1[/url]

a video of the operation of the Combine-a-line- (non usb) adapter is
here....

View here and now.....[url]http://www.youtube.com/v/R0aGKJQc7rc[/url]


Thanks for viewing

Marc