Asymmetric Digital Subscriber Line. Asymmetrical means that the highest speeds occur when data is coming into your business 'downloads' rather than sending or 'uploading' data. Use you phone as normal.
Velocity allows data and voice integration.
By using the same line for voice and data traffic, you can actually avoid the cost of a second phone line. It is difficult to quantify how fast your access will be as it is affected by several other factors. For example, the distance your business is from the telephone exchange, the traffic on the Web site you are visiting and even the time of day can influence the speed. What can be guaranteed is it will be significantly faster than a standard 56k modem. Velocity allows computer data to be sent down existing Telecom telephone lines, but at a different frequency than voice data.