[Asterisk-Users] static noise with this hardware any advice

[Geoff Manning]

Patrick Fortin wrote:
> 
> At first it was on scsi drives but we re-installed using a IDE drive
> We deactivated the two onboard nic and tried two different brand.
> We have deactivated hyper-treading
> We have deactivated USB
> We have deactivated SATA
> We have tried a noise-cancelling power-bar
> We have tried two different phones lines
> We have tried several IP phones, Cisco, Snom, Gnet
> (There is no noise for a call between two phones)
> The phone is connected directly in the nic card so there is no network
> problem possible.
> We have tried several TDM Card
> 
> Anybody knows if the motherboard or the power-supply could be the
> problem ? 
> 

I am going through a similar procedure. I contacted Digium support but they
say my hw is not supported (Dell SC420). They are right, but I have another
installation of this in another location without the line noise. AND, I put
the TE110P card in another supported motherboard and have the same noise.

What are your results with zttest?? Is it above 98.5% 

How about IRQ sharing (# lspci -vb ) or (# lspci -v)?

What kernel are you running? I am running 2.6.11 and I am passing this as
kernel parameters at boot:

kernel          /boot/vmlinuz-2.6.11.11 root=/dev/md0 ro acpi=off noapic

The "acpi=off" and "noapic" is what helped get my zttest score to a near
100%.

Hope something here helps, either way I'll be watching this thread to
perhaps solve my own problem.