usb and firewire support --- Re: [olug] Firewire PCI cards

[Brian Wiese]

Be sure to also check out linux-usb.org and 
http://www.qbik.ch/usb/devices/
for the list of supported usb2 etc... devices/chipsets on linux

Brian


On Fri, 14 May 2004 04:00:32 -0500
Christopher Cashell <topher at zyp.org> wrote:

|At Thu, 13 May 04, Unidentified Flying Banana Ryan O'Rourke, said:
|> I'm buying one of those combo Firewire and USB 2.0 PCI cards this
|> weekend so I can start video conferencing with a webcam.
|
|[Snip.]
|
|Just a quick little notice or warning to people, for when you buy USB
|2.0 devices. . . Always read the product information *very* carefully.
|USB 2.0 does *not* guarantee that a device uses the high speed 480Mb/s
|spec.
|
|USB 2.0 actually supplies specifications for three USB speeds, Low-Speed
|(1.5Mb/s), Full-Speed (12Mb/s) and High-Speed (480Mb/s).  Things like
|keyboards and mice use the Low-Speed spec, as they have no need for
|higher bandwidth.  Ideally, NIC's, cameras, pen drives, etc, will use
|the High-Speed spec.  Things that require more bandwidth than 1.5Mb/s,
|but don't need more than 12, will continue using the Full-Speed spec.
|
|Just be careful, though, because there are a number of unscrupulous
|device manufacturers that are marketing "USB 2.0" devices that use the
|Full-Speed bandwidth spec.  I have a friend who's already gotten burned
|on this, buying a device that was advertised as USB 2.0, but only in the
|small print does it mention that its bandwidth is only 12Mb/s.
|
|Look for the "High-Speed USB" graphic, or check the fine print
|information to make sure you're getting what you think you are.
|
|> -- Ryan
|
|-- 
|| Christopher
|+------------------------------------------------+
|| Here I stand.  I can do no other.              |
|+------------------------------------------------+
|
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