[Asterisk-Users] Line Noise UPDATE - If you've got line noise, read this

[Rich Adamson]

Since this thread has been going on for awhile, I've forgotten whether
anyone mentioned that at least some Sipura products shipped with a 
10 millisecond rtp time. My spa3k was this way. I changed it to 20
milliseconds and reboot. Might just try that if the setting is avail
to you.

------------------------

> We have basically the same setup. My cards are on 5 and 7 as well and I've
> disabled EVERYTHING is the bios that is not necessary; USB, serial,
> parallel, ect. I would think that if it was an IRQ issue, the call wouldn't
> tank when I connected it on the card with it's own IRQ. I just got in my new
> Cisco 7940 a few minutes ago and when I get a powersupply for it, I'm going
> to remove the Sipura-841 and try this one out and see if maybe that doesn't
> fix the problem. I'm doubtful, but it seems that this POS sipura is the only
> thing that is REALLY differing from out configurations. I didn't install X
> when I setup this box, so I know it's not running, but it's good to know
> that it can cause problems. Thanks for the info, every bit helps.
> 
> 
> Paul
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Walt Reed
> Sent: Friday, April 22, 2005 05:41
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Line Noise UPDATE - If you've got line
> noise,read this
> 
> On Fri, Apr 22, 2005 at 02:40:10AM -0500, Paul said:
> > 
> > Ok, well I managed to fix the IRQ conflicts...well, sorta. I have two
> X100P
> > cards in the system. One now has it's own interrupt and the other is
> sharing
> > one with the soundcard. I tested outbound calls on both cards, still have
> > the damn static. I am so sick of this. Is anyone else using X100P cards
> and
> > NOT having this problem?? 
> 
> Yes. I can make a call from a POTS phone hooked up to a Cisco ATA 186,
> out one X100P to the PSTN, back in a second X100P, to a phone hooked up
> to the second  port on the ATA186 with no noise, and no echo, and a
> pretty small delay (which you can hear with one handset in each ear.)
> 
> I have disabled most of the on-board I/O such as parallel, serial, and
> extra USB controllers, and the X100's are on int 5 and 7, not shared
> with anything. Interrupts 10 and 11 have a bunch of stuff shared and are
> used by USB controllers, ethernet ports (one on each IRQ) video card,
> SCSI controller, and one "unknown device" (some special nVidia device.)
> 
> This machine is also used as a firewall / gateway / email server but
> does NOT run X (which I hear can cause problems on some machines.) I've
> been running this configuration for about 9 months with virtually no
> problems in a SOHO environment including weekly 3-hour long conference
> calls.
> 
> I realize this doesn't help you much, but it IS possible for the
> configuration to work.
> 
> I have been thinking about getting a Sipura 3000 to add another FXS port
> and remove one X100P which would also cut down on the number of
> interrupts, leaving me one X100P for timming (so I don't need ztdummy.)
> 
> MAYBE this would help you.
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