[asterisk-users] TDM400p susceptible to EMI?

[Tim Nelson]

----- Original Message -----
> 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?

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.

Also, it could be your system's ability to handle interrupts as that will cause clicks/pops as well.

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.

--Tim