Black Box IC244A-R2, Руководство пользователя

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SINGLE/DUAL USB-CAT5 EXTENDER 165FT
10
2.2.4 USB Cables
USB cables have two distinct connectors. The Type A connector is used to
connect the cable from a USB device to the Type A port on a computer or
hub. The Type B connector is used to attach the USB cable to a USB device.
USB Type A
port
USB Type A
connector
USB Type B
port
USB Type B
connector
2.2.5 Power Handling
Some USB devices are powered directly from the USB and do not require
individual power supplies. These devices are called bus-powered devices.
The USB-CAT5 Extender can provide power to these devices so they can be
operated remotely.
Bus-powered devices are further divided into low-power and high-power
categories. Low-power devices are allowed to draw up to 100 mA from the
USB. Typical examples include mice, joysticks, and keyboards without
hubs. High-power devices are allowed to draw up to 500 mA from the USB.
Typical examples include cameras and keyboards with hubs. To determine if
a device is high-power or low-power, consult the user documentation for the
device.
The USB-CAT5 Extender can supply sufficient power to support all low-
power devices and most high-power devices. Devices that place a very heavy
power drain on USB (>300 mA) are not supported. Most USB devices
operate well within this power budget.
NOTE
Devices with their own power source are usually considered to be low-power devices from a USB
perspective and are thereby compatible with the USB-CAT5 Extender.
2.2.6 Compatibility
The USB-CAT5 Extender complies with USB 1.1 specifications governing
the design of full-speed and low-speed USB devices. However, Black Box
does not guarantee that all USB 1.1 devices are compatible with the USB-
CAT5 Extender.
.