We've been using Vonage for over a year now and it's great. We pay something like $25 per month for each line (we have 3) and it includes free long distance. It's cut our phone bill (while our call volume has increased!) from $1500 to $600.
They send you very simple little cisco VOIP boxes, all you do is plug the ethernet into the network and the phone into the PBX/Phone and you're set.
Slashdot Mirror
We've been using Vonage for over a year now and it's great. We pay something like $25 per month for each line (we have 3) and it includes free long distance. It's cut our phone bill (while our call volume has increased!) from $1500 to $600. They send you very simple little cisco VOIP boxes, all you do is plug the ethernet into the network and the phone into the PBX/Phone and you're set.