On Wed, Jul 13, 2011 at 2:51 PM, Steve Edwards
<asterisk....@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, Tim Nelson wrote:
Many Mini-ITX cases have horrific power supplies to keep overall cost
down. 'Cheap' doesn't begin to describe them. They *will* introduce
audio issues, especially where you're using FXS modules.
This box is using a picoPSU-80 80w DC-DC 'power supply' fed from an inline
'laptop brick.'
Also, it could be your system's ability to handle interrupts as that
will cause clicks/pops as well.
Out of 300 samples from dahdi_test, there were 3 'outliers' -- 70.317%,
87.397%, 95.899% which is not comforting, but they don't correlate with
the stream of noise.
Third, try putting the card directly into the motherboard. PCI risers
can be finicky, especially the 'ribbon style' units. The solid PCB units
I've found are typically fine.
This case will not accommodate that unfortunately. This is a rigid PCB
unit.
--
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards sedwa...@sedwards.com Voice: +1-760-468-3867 PST
Newline Fax: +1-760-731-3000
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