Converting USB 1.1 ports to USB 2.0 ports.

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All Forums > Tech Talk > Tech Talk Forum Page 36 > Converting USB 1.1 ports to USB 2.0 ports.

Author	Post
Bob All-Star Member 5516 Posts 3/03	Posted - Nov 21 2006 : 2:35PM My computer has two USB 1.1 ports in the front panel and two in the back panel. My motherboard doesn't support USB 2.0, but I've added a PCI adaptor card to add four external USB 2.1 ports to the back panel. That same PCI card also has two internal ports. Is there some way that I can connect those internal USB 2.0 ports to the front panel ports (e.g., using some kind of adaptor to interface between the USB 1.1 pin-connector cable from the front and the internal USB 2.0 ports in the back)? [Link]
Bornyo Deactivated Member 803 Posts 12/04	Posted - Nov 21 2006 : 3:27PM Paper clips and bread ties, Bob. (Sorry, no serious advice to offer) [Link]
Drew Black broken crankshaft 8011 Posts 9/99	Posted - Nov 21 2006 : 9:56PM Bob wrote: Is there some way that I can connect those internal USB 2.0 ports to the front panel ports (e.g., using some kind of adaptor to interface between the USB 1.1 pin-connector cable from the front and the internal USB 2.0 ports in the back)? Click to expand I doubt it. Some of the performance gains in USB 2.0 are due to better signal integrity at higher frequencies. (better cables, connectors, termination, etc.) You might be able to find an adapter that makes the physical connection to the PCB that front-panel connectors are mounted to. It might even work for most USB devices, but there's no guarantee it will work for everything. It's a bit like the various SCSI speeds and specs. Many use the same conenctors but the cabling requirements are different. (I learned this the hard way with ULTRA320 SCSI drives on inferior cables. It resulted in ADT going offline randomly and took a while to diagnose.) You might be better off with an external USB hub/extender plugged into one of the USB 2.1 connectors on the back side of the computer. [Link]
kukm4 Member so-cal 212 Posts 9/04	Posted - Nov 22 2006 : 3:27AM you could go with a USB hub (usb 2.0) just make sure cable lenght is enough to reach front of pc. some velcro and your set. :D Day after Thanksgiving sales just a few days away.. maybe you find a good deal on new pc with front side usb. [Link]
oatmeal Meat Popsicle Seeking Beauty 1738 Posts 8/04	Posted - Nov 25 2006 : 7:30PM instead of an adapter how about something like this? [Link]

Bob All-Star Member 5516 Posts 3/03	Posted - Nov 25 2006 : 8:09PM Excellent suggestion, Oatmeal! Thank you. [Link]
jrv Senior Member 1266 Posts 2/03	Posted - Nov 28 2006 : 10:21PM Drew Black wrote: Some of the performance gains in USB 2.0 are due to better signal integrity at higher frequencies. (better cables, Click to expand Quick correction here: USB 1 cables work with USB 2 also. There turned out not to be any need to change the spec requirements for external cables so there was a deliberate decision not to do so in order to minimize confusion. Basically, if you have a USB cable you can use it anywhere, no need to worry about USB 1 vs. USB 2 vs. whatever. Any USB plug works in any USB socket. The media layer / EE guys did a great job on USB (a lot better than the protocol people). There are people selling cables as "special USB 2 qualified" but that's just marketing spew: they might as well be selling silver oxygen-free snake-oil insulated cables. [Link]
Drew Black broken crankshaft 8011 Posts 9/99	Posted - Nov 29 2006 : 2:37AM Doesn't it run at a faster frequency? [Link]
jrv Senior Member 1266 Posts 2/03	Posted - Nov 30 2006 : 4:09AM Drew Black wrote: Doesn't it run at a faster frequency? Click to expand Much higher though I forget how much. But USB1 had headroom, and the transceivers are better now. Hence it was possibly to increase the frequency without changing the cable specs. It's been a long time since I looked at the docs and I can't remember if USB1 and USB2 used the same signaling levels and encoding on the wire; this might have helped too (much as gigabit copper ethernet went to five-level signaling from 100Mb's binary level, etc). Most USB transfers are CRC protected; if the cable introduces noise you might not be able to talk to a device but you won't read bad speckles in a picture for example. But I think isochronous transfers are not CRC protected so a bad cable really would result in bad data being read. [Link]
Bob All-Star Member 5516 Posts 3/03	Posted - Mar 31 2007 : 11:43PM I found a good solution along the lines that Oatmeal suggested. I purchased an Ultra 3.5" Media Dashboard on eBay for $14.95. Well built and simple to install. Ultra sells a 5.25" media dashboard that has more features, including a card reader and an SATA connector. I also found a company called FrontX, which offers varied and flexible modular configurations for front panel add-ons. You need an open 5.25" front bay and the willingness to spend more money. In addition, FrontX sells a number of internal cables designed for "roll your own" solutions. * [sp] Edited by - bob on 3/31/2007 11:45:11 PM [Link]

All Forums > Tech Talk > Tech Talk Forum Page 36Converting USB 1.1 ports to USB 2.0 ports.

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