[asterisk-users] Digium TDMXXB and Electronic Noises

[Matthew Yingling]

You are probably both correct.  I noticed that both of our TDM cards, and
the Ethernet card are all sharing  the same IRQ.  Since we do VOIP
internally and analog externally, that IRQ is getting hit twice for any
outbound or inbound calls.  The system is new, and the OS supports ACPI, so
I'm not yet sure what's going on.  


> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Tim Nelson
> Sent: Thursday, January 31, 2008 1:27 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Cc: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [asterisk-users] Digium TDMXXB and Electronic Noises
> 
> I second that. IRQ issues are more than likely causing the problem.
> Check your interrupts and see if your TDM cards are sharing IRQs with
> any other devices. From past experience, I know we would get the same
> behavior when an analog card was sharing an IRQ with a storage
> controller. Any amount of disk activity would cause little blips and
> beeps in the audio stream. Make sure you have all extraneous unneeded
> devices turned off in the BIOS.
> 
> Tim Nelson
> Systems/Network Support
> Rockbochs Inc.
> (218)727-4332
> 
> ----- Original Message -----
> From: "Steve Totaro" <stotaro at totarotechnologies.com>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> <asterisk-users at lists.digium.com>
> Sent: Thursday, January 31, 2008 11:34:18 AM (GMT-0600) America/Chicago
> Subject: Re: [asterisk-users] Digium TDMXXB and Electronic Noises
> 
> On Jan 31, 2008 12:28 PM, Matthew Yingling <matt at xenotran.com> wrote:
> > I recently moved an installed and working Asterisk system from one PC
> to
> > another.  I moved two Digium TDMXX cards and the OS as well  (a live
> > distro).  I tuned the hardware on the new PC, but for some reason
> analog
> > calls periodically have some electronic noise.  It's like beeps, but
> more
> > musical.  I do not recall noticing this on the old PC, but
> immediately
> > noticed it on the new system.  Since the hardware and the OS are the
> same,
> > I'm not sure what could be causing this issue, or how to remedy it.
> Any
> > ideas?
> >
> > Thanks,
> > Matthew Yingling
> >
> 
> IRQ issues i would suspect.
> 
> Also,just because two machines are the same make and model absolutely
> does not mean that they have the same hardware.  I have seen exact
> server models ordered from CDW at the same time have very different
> chipsets.
> 
> Thanks,
> Steve Totaro
> 
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