BenQ PH460 Installation Handbook page 21

USB cable length
For each passive connection between a two USB devices, the maximum length is 5 meters. To
extend USB connection beyond this length limit, an active extension cable has to be used to
ensure stable signal transmission and reliable power supply.
Prohibited cable assemblies
Some cable assemblies are prohibited in the USB specifications and are not recommended as
they may not work in all instances. For example, passive extension cable assembly: a cable that
has a Type-A plug on one end and a Type-A receptacle on the other, or a Type-B plug on one
end and a Type-B receptacle on the other. This allows multiple cable segments to be connected
together, possibly exceeding the maximum permissible cable length.
Cable extension guide 21