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Subject to errors and modifications
W&T System Overview
1
With respect to data throughput - especially when
connecting High-Speed USB devices - it must be
remembered that only a theoretical bandwidth of maximum
100Mbis/s is available on the network side.
2.1.3 System overview
On the hardware side the W&T USB-Server adapts the USB
devices. Processing of the time-critical USB protocol takes place
locally and is mirrored - time-decoupled - on the network side
to a TCP server service.
On the software side the W&T USB Port Redirector acts as a
virtual USB host controller. When the user connects to one of
the USB devices, the latter is available to the respective system
after opening the network connection as if it were locally
connected. Connections to USB devices are always exclusive,
i.e. a simultaneous attempt from a competing USB Port
Redirector is rejected and can only take place after closing the
first connection.
In order to keep the configuration effort of the firewall in
protected environments to a minimum, the entire network
communication takes place or a single, configurable TCP port.
In parallel with this there are management services for
configuration, firmware updates etc. available which, however,
are not required for the connection between USB-Server and
USB Port Redirector.
A list of all ports used by the USB-Server can be found in the
Appendix.
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