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

[Patrick Fortin]

Follow-up on this

We have tried several things without success.

Digium responded that the problem was NMI (non-maskable interrupts) and 
told me to boot linux with the nmi_watchdog=0 option

It did not solve the problem.

Finally I replaced the TDM card with an older one (revision F) 2FXO 2FXS

And the static noise is gone !!

Anobody have an idea why this happened

Of course it doesn't solve my problem because we have one old card and 
several new card but it may give digium an idea of where is my problem

Patrick



Hi

We have static noise problem on our asterisk server. latest stable release.
The card is a new TDM04B

We have it installed on the following hardware

Motherboard Intel SE7520BD2SCSI
2x POWER SUPPLY 730W INTEL

I will not mention the other hardware because we have desactivated/changed 
all the other items
The only 2 items that we have not changed is the mobo and the power supply.

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 ?