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Windows 7: USB cable extension length 15 foot plus 1.5 foot to a powered hub

27 Jun 2016   #1
sdowney717

Windows 7 Ultimate x64
 
 
USB cable extension length 15 foot plus 1.5 foot to a powered hub

Maximum length for usb 2.0 is 5 meters. = 16.4 feet

If I get a usb 2.0 extension cable of 15 feet and plug in this 3.0 powered hub with its supplied 1.5 foot cable, will it fail to work?
Scheme is PC to 15 foot extension cable to 1.5 foot cable to hub.


Black 7 Port USB 3 0 Hub on Off Switches AC Power Adapter Cable for PC Laptop | eBay

Total cable length becomes 16.5 feet which is 1/10 foot longer than max of 16.4 feet. Will that extra 1/10 feet length be too much length?


My System SpecsSystem Spec
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27 Jun 2016   #2
sdowney717

Windows 7 Ultimate x64
 
 

For a test, I strung together 3 extensions usb and plugged in a mouse. Total length is 19 feet.
The mouse works perfectly.
So, I wonder about this extension length specification.
My System SpecsSystem Spec
27 Jun 2016   #3
sdowney717

Windows 7 Ultimate x64
 
 

Ok, now I un plugged the mouse and plugged in this usb keyboard.
It also is working fine.
My System SpecsSystem Spec
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27 Jun 2016   #4
Lady Fitzgerald

Win 7 Ultimate 64 bit
 
 

When you go past the specified maximum length, your maximum possible speed drops. signal strength also drops. Most keyboards and mice don't need maximum USB 2.0 speeds and signal strength which is why you were able to get away with the longer length.
My System SpecsSystem Spec
27 Jun 2016   #5
sdowney717

Windows 7 Ultimate x64
 
 

I have read it is a timing issue, too long cable, usb is half duplex, has to wait for responses, so the time the signal takes between end points gets too great and it times out and stop responding. Reading about it, this is described as it just fails to work at all. So not a signal strength issue.

Frankly, I am surprised but pleased it worked. I ordered a 15 foot monoprice USB 2.0 extension cable and that powered hub 3.0.
My System SpecsSystem Spec
27 Jun 2016   #6
townsbg

Windows 7 pro 64-bit
 
 

Note that without a usb 3.0 port on your computer you will only get usb 2.0 speeds even on a 3.0 hub. Also as stated you won't get full speeds with such a long cable. That won't matter with a keyboard and mouse but it could impact the use of external hard drives and thumb drives.
My System SpecsSystem Spec
27 Jun 2016   #7
sdowney717

Windows 7 Ultimate x64
 
 

I know, that makes sense.
I need to connect a GPS, mouse, keyboard. That is it. I have a built in PC on our boat and had to move it. So needed longer cables.
My System SpecsSystem Spec
27 Jun 2016   #8
Wandering one

Win7 sp1 Pro 64bit / XP sp2 Pro (games only)
 
 

Might work better to forget hub and pass three individual GOOD quality cables. With hub all have to use a single line.
Art,
My System SpecsSystem Spec
27 Jun 2016   #9
Lady Fitzgerald

Win 7 Ultimate 64 bit
 
 

Quote   Quote: Originally Posted by townsbg View Post
Note that without a usb 3.0 port on your computer you will only get usb 2.0 speeds even on a 3.0 hub. Also as stated you won't get full speeds with such a long cable. That won't matter with a keyboard and mouse but it could impact the use of external hard drives and thumb drives.
Totally off topic but I love your dancing banana!
My System SpecsSystem Spec
27 Jun 2016   #10
Lady Fitzgerald

Win 7 Ultimate 64 bit
 
 

Quote   Quote: Originally Posted by Wandering one View Post
Might work better to forget hub and pass three individual GOOD quality cables. With hub all have to use a single line.
Art,
The keyboard and mouse probably would be able to share a single cable but adding a GPS could create bottle necks, in which case a second (Plan B) or a third (Plan C)USB cable may be needed.

Plan D would be an active extension cable like this: https://www.amazon.com/dp/B00GLZYG5S...9EH2R3OR&psc=1
My System SpecsSystem Spec
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 USB cable extension length 15 foot plus 1.5 foot to a powered hub




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