What Is Usb - AVM FRITZ!CARD USB Manual

2 All About FRITZ!Card USB

2.5 What is USB?

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F F F F F R R R R R ITZ!Car ITZ!Car ITZ!Card U ITZ!Car ITZ!Car d U d U d USB, d U SB, SB, SB, a product in AVM's FRITZ!Card line, is an SB,
external ISDN-Controller. F F F F F R R R R R ITZ!Car
connected to that of the computer or USB hub using the cable
provided.
U U U U U SB SB SB SB SB stands for U U U U U niversal S S S S S erial B B B B B us. USB devices can use the
bus with a throughput of 12 Mbit/s or 1.5 Mbit/s. USB brings a
new standard in convenience and flexibility to the PC: now the
computer can be expanded with additional peripherals simply
by plugging the USB device into the bus and installing the driver
software. USB peripherals are connected by uniform standard
connectors.
These features make USB the ideal platform for connecting input
and communications devices to the PC. USB offers true, "hot"
plug & play and allows the connection of up to 127 devices.
The USB architecture supports peripheral devices of any kind.
A guideline specifies how each device may claim bandwidth on
the bus. The USB topology is tree-shaped, with a host controller
at the root. USB hubs are the nodes at which the tree can branch;
the peripheral devices themselves are the leaf nodes. The cable
connecting any two nodes—consecutive hubs or a hub and a
terminal device—may be up to five meters long. Hubs may be
built into the host computer or into any other USB device, such
as a monitor or keyboard.
Peripheral devices in the USB standard are divided into two
classes: fast devices, which use the bus at 12 Mbit/s, and slow
devices, with throughput of 1.5 Mbit/s. According to this
classification AVM's F F F F F R R R R R ITZ!Car
provides several different data transfer modes: bulk, interrupt,
isochronous and control mode.
All of these characteristics make USB an outstanding solution
that puts an end to the plethora of cables and interfaces in a
typical standard computer system.
ITZ!Car ITZ!Car d U d U SB
ITZ!Card U ITZ!Car d U d USB SB SB's USB socket is
ITZ!Car ITZ!Car d U d U SB SB
ITZ!Car ITZ!Card U d U d USB SB SB is a fast device. USB
SB