[maemo-users] 3G dongle connected to N900?

From: Matan Ziv-Av matan at svgalib.org
Date: Mon Mar 8 17:17:23 EET 2010
On Mon, 8 Mar 2010, Xavier Bestel wrote:

> On Mon, 2010-03-08 at 10:31 +0100, Klaus Rotter wrote:
>> Am 07.03.2010 02:07, schrieb Peter Flynn:
>>> Jan Knutar wrote:
>>>> N900 does not have USB Host Mode, so no.
>>> You're kidding? Did they not learn from the N800 at all?
>> The problem is to use the USB port as a plug in for the charger/ac
>> adapter. On the N8x0, there was a separate input for the charger. All
>> new cellular phones in the EU must have a micro USB port as a connector
>> for an ac adapter (in the future). There are some problems to use the
>> USB port both as power input and also power output (required in host
>> mode). And yes, I really want a USB host mode, too.
> IIRC it's forbidden by the USB spec. Also the spec says you can't have
> OTG and more than one USB connector.
> So basically the Euro spec forbids host mode on phones.

No, that is a myth. The facts are:

1. There is no mandatory regulation, only a voluntary MoU (Memorandum of
    Understanding), so nothing is forbidden.
2. Said memorandum allows for devices not following it if there is a
    good reason. It seems to me that supporting host mode is a good
3. The MoU allows for using an adapter for microUSB charging, so Nokia
    could include standard Nokia charger connection in the phone, and
    include an opposite adapter in the box.
4. The MoU only covers devices introduced to the market after 1/1/2010,
    so it is irrelevant to the N900.


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