asterisk users - Aug 2004 - Static on outgoing calls using either X100P or TDM400P

Hello.  I've seen several posts talking about line quality using Digium 
cards that are sharing IRQs or on machines where X is running but after 
trying all of those fixes I am still having a problem with line static 
on outoing calls.  BTW, calls that are from one extension to another 
extension have no static, however, they have occasional clicks and 
pops.  At any rate, I was wondering if someone might be able to help 
figure out how to fix this problem.

Here is some information about my setup:

Celeron 2.4Ghz w/ 256MB of Ram running Mandrake 9.2 with the 
2.4.22-36mdk kernel installed with X not installed.  This happens to be 
running on an Intel MB Model (D865GBF)

1 - X100P
1 - TDM400P configured with 4 FXO ports

each of these cards have their own IRQ.

I am running RC2 *, zaptel drivers, etc.

I've fiddled wit hteh tx/rx gain and have succeeded only in decreasing 
the volume of the static.

Any suggestions?

Have you had a play with irqmasking on your drivers? Are they IDE
drivers? If so, try: hdparm -u1 /dev/<drive>

Do this for each of your IDE drives, this seems to have fixed a number
of peoples issues in the past.

Also, when you say nothing is sharing an IRQ, is this according to
proc/interrupts? Don't forget that unless the kernel has a driver for
the device, it wont show up in that listing. Double check using lspci -v

Apart from that, get a line test done. Your telcom provider should do
one at your request.

In the end I changed the box they were running in, and all was resolved.
Extreme I know, but it worked :)

Cheers,

Ben

-----Original Message-----
From: asterisk-users-admin@lists.digium.com
[mailto:asterisk-users-admin@lists.digium.com] On Behalf Of Lenny Self
Sent: 13 August 2004 21:33
To: asterisk-users@lists.digium.com
Subject: [Asterisk-Users] Static on outgoing calls using either X100P or
TDM400P

Hello.  I've seen several posts talking about line quality using Digium 
cards that are sharing IRQs or on machines where X is running but after 
trying all of those fixes I am still having a problem with line static 
on outoing calls.  BTW, calls that are from one extension to another 
extension have no static, however, they have occasional clicks and 
pops.  At any rate, I was wondering if someone might be able to help 
figure out how to fix this problem.

Here is some information about my setup:

Celeron 2.4Ghz w/ 256MB of Ram running Mandrake 9.2 with the 
2.4.22-36mdk kernel installed with X not installed.  This happens to be 
running on an Intel MB Model (D865GBF)

1 - X100P
1 - TDM400P configured with 4 FXO ports

each of these cards have their own IRQ.

I am running RC2 *, zaptel drivers, etc.

I've fiddled wit hteh tx/rx gain and have succeeded only in decreasing 
the volume of the static.

Any suggestions?

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I'd just ask for an end to end test, and line survey if needs be. You
want them to be testing for static along the call route; your line might
in fact be a number of lines tagged together (for example if you have a
EuroISDN line).

Ben

-----Original Message-----
From: asterisk-users-admin@lists.digium.com
[mailto:asterisk-users-admin@lists.digium.com] On Behalf Of Ryan
Courtnage
Sent: 16 August 2004 17:24
To: asterisk-users@lists.digium.com
Subject: Re: [Asterisk-Users] Static on outgoing calls using either
X100P or TDM400P

Ben Merrills wrote:
>>Hello.  I've seen several posts talking about line quality using
Digium 
>>cards that are sharing IRQs or on machines where X is running but
after 
>>trying all of those fixes I am still having a problem with line static
>>on outoing calls. 
>Apart from that, get a line test done. Your telcom provider should do
>one at your request.
>
Any idea what you would ask the telco to test for? 

I too have seen tdm400ps stop working and output only static noise 
(requiring wcfxs module reload).  The solution to the problem is never 
the same.  Sometimes changing PCI slots, relocating the computer, using 
a noise reducing powerbar, even changing computers completely.  In all 
cases, I'm not 100% confident that the problem has been resolved for
good.

If there is a phone-line condition that will trigger the tdm400p driver 
to go into this non-functional state, I'd love to know what it is, and 
how to test for it.

Thanks
Ryan

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