The connection between a computer and speakers, printer and docking station or scanner can usually be achieved by means of a cable extension USB cord, which is used as well for surround sound wiring. According to the usage instructions, the USB technology is compatible with the so-called passive extension cables, containing an active repeater chip. 16 feet is the maximum optimal distance for the USB extension, anything longer than that, may lead to damage of the USB equipment and data loss. A possibility to make the distance longer is to connect several cable extension USB devices but not more than 80 feet, which would be approximately four regular cables bound together.
Basically, the entire installation process consist of connecting the cable extension. USB ports on notebooks and desktops are perfectly compatible with devices. Usually double shielded, extension cables USB applications make transfer rates possible at up to 480 Mb per second. Most cables are compatible with with Macs and PCs alike and any high-speed USB corresponds to the compliance protocol, whether it is 2.0, 1.1 or 1.0. The built-in electronics provide reliability to the USB cables maintaining a good operation mode both at longer distances or peripherally.
The cable extension USB connectors are different, a distinct one for each part of the cable, such as A male or A female. The A female connects to the computer port while the A male connects to the next cable, in case the scanner or the printer requires further extension. The truth is that as a replacement to serial devices, the USB cable connection is a lot easier and more reliable. And the usage is omni-present if we think that any portable or desktop device now incorporates and solely relies on USB technology. Modern notebook and desktop versions no longer incorporate serial ports, and neither mouses nor keyboards have serial connectors.
The need for a cable extension USB cord is not exactly common occurrence. Most PC owners work well to the regular cable length and do not need extensions. It seems that Apple users are those who rely on USB connectors more frequently as Macs have fewer USB ports incorporated. Cable extension USB cords are most often needed for the connection of office electronics, which makes them necessary for networks, multiple office usage and lots of situations when the distance between one appliance and another is larger than 16 feet.