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[ts-7000] Re: Huawei E226 HSPA Modem

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Subject: [ts-7000] Re: Huawei E226 HSPA Modem
From: "naturalwatt" <>
Date: Thu, 19 Jun 2008 19:21:53 -0000
--- In  Samuel <> wrote:

> 
> I am trying to use a Huawei E226 HSPA Modem 
> (http://www.huawei. com/mobileweb/ en/products/ view.do?id= 282) with the 
SNIP
> 
> The first problem I have found is that the 7260 becomes very unstable 
> just by plugging the modem in. The board reboots several times until 
> it finally gets to the login prompt. Once there, it may lock or 
> reboot again after several minutes with no other action from my side.

The reboot is more than likely due to power surges taken by the modem.  I used 
a GSM 
modem on TS7260 and found that I needed a PSU capable of handling spikes of 3A 
otherwise the thing would reboot (probably due to brownouts) every time it 
tried to log 
onto the network.

The overall power requirement was low, but the peak requirement was high.

I have also seen this behaviour with USB devices that take a power-on surge.


Martin


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