[asterisk-users] TDM400p susceptible to EMI?

[Jeff LaCoursiere]

On Wed, 2011-07-13 at 17:19 -0400, Andrew Latham wrote:
> On Wed, Jul 13, 2011 at 5:16 PM, Tim Nelson <tnelson at rockbochs.com> wrote:
> > ----- Original Message -----
> >> > On Wed, Jul 13, 2011 at 2:51 PM, Steve Edwards
> >> > <asterisk.org at sedwards.com> wrote:
> >> >> I have a TDM400p with 3 fxs and 1 fxo daughter cards.
> >> >>
> >> >> It's in a mini-itx case with a 'right-angle' PCI riser card so the
> >> >> TDM400p
> >> >> is 'sandwiched' between the Atom D525 CPU and the 2.5" hard drive.
> >> >>
> >> >> I'm getting a bunch of clicks and pops on all ports.
> >> >>
> >> >> Has anybody had a similar experience? Did you find a solution?
> >>
> >> On Wed, 13 Jul 2011, Andrew Latham wrote:
> >>
> >> > How is it grounded? Silly I know but its possible.
> >>
> >> This box is using a picoPSU-80 80w DC-DC 'power supply' fed from an
> >> inline 'laptop brick.'
> >>
> >> I ran a separate lead from the chassis to the grounding plug on the
> >> same
> >> 'duplex' wall outlet. No joy.
> >>
> >
> > picoPSU's are typically pretty good. I wouldn't suspect it in this case then unless your power supply is underpowered for the hardware's current draw.
> >
> > --Tim
> 
> I also use the pico-PSUs and have not had any issues.
> 

I do too - have dozens in the field.  We use Rhino cards though, and no
FXS (only FXO and T1).  Also constrained by the case and use a
horizontal riser, dual Atom.  No hard drives though - 4G Sata flash
drives.

j