[Soekris] +12V power on net5501 + Digium TDM400P

[Brandon Black]

On 10/16/07, Bob Bishop <rb at gid.co.uk> wrote:
> Hi,
>
>
> On 16 Oct 2007, at 18:36, Brandon Black wrote:
> > [...]
> >   My question is about +12V power to the TDM400P PCI card. [etc]
>
>
> See this post:
> http://lists.soekris.com/pipermail/soekris-tech/2007-July/012550.html
>

I read that thread earlier, but it wasn't very conclusive.  It
continues in August:
http://lists.soekris.com/pipermail/soekris-tech/2007-August/012569.html

What I gathered from that thread was:

A) That the TDM400P requires +12V on the 4-pin molex connector for FXS
ports, and won't use it from the PCI bus even if it's available at
sufficient amperage (in other words, the grounds are certainly shared,
but the +12V for the FXS must come from the molex rather than the PCI
bus).

and

B) That the guy who started that thread ended up giving up and putting
the card in a full-sized PC.

So my questions remain, which can basically be boiled down to:

1) Is it ok if I draw 0.8A @ 12V from the 4-pin power connector near
the SATA port on the net5501?

2) Assuming it is ok, given that I also have a CompactFlash card and a
USB flash drive connected to the net5501, is a 3.34A 12V power supply
probably sufficient, or do I really need to use the 5A I have here?

-- Brandon