From owner-freebsd-usb@FreeBSD.ORG  Mon Feb 21 13:55:54 2011
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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Mon, 21 Feb 2011 14:55:37 +0100
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Cc: "Konstantin V. Krotov" <kkv@insysnet.ru>
Subject: Re: u3g (4) device after boot/reboot without re-plugged
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On Monday 21 February 2011 14:24:28 Konstantin V. Krotov wrote:
> Possible to get to work correctly a usb 3g modem after boot / reboot
> without  re-plugged?

Can you dump the device descriptor of your device?

You could try:

usbconfig -d X.Y reset

--HPS