Enabling/Disabling USB port?


#1

I use a UD 3900 and I have a telephone recording device which saves its files to sd card. The device can be connected via usb to allow these files to be uploaded to a pc. I want the device to be permanently connected to the usb port and not to have to connect/disconnect cables however the device itself needs to be disconnected from the usb port in order to function. Is there a way to easily switch on and off a usb port on the UD3900? That is to easily enable a usb port to allow transfer or should I just get a usb switch and manually switch on the device when needed?


#2

Hi Ed,

Thanks for posting. I’d be happy to answer your question.

The short answer is no, there is not an ‘easy’ way to switch off a USB port on the docking station. There are ways to disable USB devices within Windows (which I am assuming you are running) but I think trying to do so back and forth over time will be more hassle than it is worth.

The idea of using a USB switch is probably the best alternative, but depending on the type of device it may still not work as intended. You don’t mention which device you are using, but a quick Google shows me a large number of devices like you describe. In my experience with similar devices they function in one manner when not connected to a host and then transition to mass storage mode when connected to a PC to transfer data from internal memory. The question is will the device you are using correctly switch states when connected to a USB switch that is currently switched to the port that is not connected to the device in question.

I would presume the device you are using is a USB 2.0 device and as such our USB 2.0 switch (http://plugable.com/products/usb2-swi…) would be the most appropriate unit to try. We have a no hassle 30 day return policy so if it doesn’t work as expected you could return it for a full refund.

Let us know if you have any additional questions.

Thank you,

Bob
Plugable Technologies
www.plugable.com/support


#3

Hi Bob.
Thank you for taking the time to answer my question. You correctly identified the function of the device. I will try the usb switch. Hopefully it will work. Its not expensive to try.
Thanks aagin
Ed


#4

Hi Ed,

You are very welcome. If you have time please update this thread with your results (and the model of the phone recording device you are using if possible).

Thanks,

Bob


#5