RPC Logistics need for High Security
National NVIP of the year
Check Your Security Ltd is an East of England based systems design and build integration company specialising in CCTV/IP-CCTV, structured cabling systems, Fibre cabling, Access control and Intruder security systems.
USB
What is USB?Universal Serial Bus (USB) provides a serial bus standard for connecting devices, usually to a computer.
A USB system has an asymmetric design, consisting of a host controller and multiple devices connected in a tree-like fashion using special hub devices. There is a limit of 5 levels of branching hubs per controller. Up to 127 devices may be connected to a single host controller, but the count must include the hub devices as well. A modern computer likely has several host controllers so the total useful number of connected devices is beyond what could reasonably be connected to a single controller. There is no need for a terminator on any USB bus, as there is for SCSI and some others.
USB can connect peripherals such as mice, keyboards, gamepads and joysticks, scanners, digital cameras, printers, hard disks, and networking components. For multimedia devices such as scanners and digital cameras, USB has become the standard connection method. For printers, USB has also grown in popularity and started displacing parallel ports because USB makes it simple to add more than one printer to a computer. As of 2004 there were about 1 billion USB devices in the world. Currently, the only large classes of peripherals that cannot use USB (because they need a higher data rate than USB can provide) are displays and monitors, and high-quality digital video components.
At Check Your Security Limited USB ports are specified on our systems as they allow for the attchment of wireless remote controls for our DVR systems and dongles – security devices for protected software that may be running on our systems.
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