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I have a (Dell) laptop with 3 USB ports.

There are two USB hubs connected (13 ports each, hubs are powered by external electric source); so in total there are 27 USB ports (13+13+1).

Each port has a 3G modem connected to it (CDMA USB devices).

When I go to My Computer after that - I see 11 connected devices.

When I run my own program that does some work with the modems - it can see 20.

But there are 27.

I don't get it. Why can't I, and how can I, access to all 27 devices?

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migrated from Nov 22 '12 at 19:41

This question came from our site for professional and enthusiast programmers.

Can't really see this being a programming question. Voting for migration. – Albin Sunnanbo Nov 22 '12 at 19:34
I have one guess: maybe once windows shows "Disk Z" - it runs out of letters for devices, so it doesn't recognize them? – user1837021 Nov 22 '12 at 19:35
Why would a 3G modem show up in "My Computer" at all? Do they all show up in Windows' Device Manager? – Ƭᴇcʜιᴇ007 Nov 22 '12 at 19:52
I would bring up Windows' Device Manager and check for problems. – martineau Nov 22 '12 at 21:34

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