asterisk users - Apr 2005 - Line Noise UPDATE - If you've got line noise, read this

This is an update to the message title LINE Noise HELP! Regarding the static
that floods the line and makes continuing a conversation impossible. This
was happening on my SIPura-841, but Damian on the list was experience this
same problem with POTS phones as well through his TDM400. Below is an
excerpt of what I recently sent to Damian as we've been trying to figure
this out.


Well here?s the deal with my box. I had a Celeron 400 w/ 128mb of ram and an
UATA66 HD. I finally got fed up with the static on the phone(because it
would basically cut the conversation off), so I went out and bought a brand
new system. Sempron 3000+, 512MB pc3200, 160GB UATA100
..fresh install of
asterisk and zaptel and RH9. I have two X100P FXO cards in my box. Prior to
upgrading I ran zttest and observed the results
.they were something like an
average of 99.96XX
which is below what digium is recommending. So I went and
upgraded. I tested the phone for a little over 20 minutes and it never cut
out or went static one single time, however, it was making a beeping type
sound in the background. It was sporadic and varied in volume.  I have no
idea what is causing it, but at the moment I?m quite relieved that it?s no
longer(crossing my fingers) cutting my phone calls off. I ran a zttest on
the new box and the outcome was much better, 99.987 for most of them, an
occasional 100% and sometimes it would dip down an go to 2%, 40%, 70%,ect.
But the test ended and the average was above 99.98. This whole damn thing is
quite frustrating, more so for you I can imagine. I hope we?re closer to a
solution now. Have you seen anyone else on the list that has found a cure or
workaround? BTW, I was running samba and I stopped the service, but the
static continued. (We thought Samba might be part of the problem as my
TCPDUMP showed netbios activity at the exact time the line went south...no
dice though)


Update further...The first conversation on the phone had the beeping as
described above, it occurred throughout the conversation. All of the
subsequent calls made (about 5, all less than 5 minutes) have been crystal
clear and I couldn't tell the difference from that or my POTS phone
connected to the local loop. 

I do have a concern though, if the TDM400 is so seemingly problematic, what
else could one use to connect multiple analog phones to the box??? 


Cheers,

?
Paul Shiflet

Ok, well, much to my dismay I just had a call go south on me. It seems to
only happen when it's business. I can talk personal all night and not have
the problem. It must be the black cloud that lingers over my head. Either
way, I am so sick of this. I hope someone can figure out what the hell is
causing this.

Completely Discouraged

-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Paul
Sent: Wednesday, April 20, 2005 11:52
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: [Asterisk-Users] Line Noise UPDATE - If you've got line noise,read
this

This is an update to the message title LINE Noise HELP! Regarding the static
that floods the line and makes continuing a conversation impossible. This
was happening on my SIPura-841, but Damian on the list was experience this
same problem with POTS phones as well through his TDM400. Below is an
excerpt of what I recently sent to Damian as we've been trying to figure
this out.


Well here?s the deal with my box. I had a Celeron 400 w/ 128mb of ram and an
UATA66 HD. I finally got fed up with the static on the phone(because it
would basically cut the conversation off), so I went out and bought a brand
new system. Sempron 3000+, 512MB pc3200, 160GB UATA100
..fresh install of
asterisk and zaptel and RH9. I have two X100P FXO cards in my box. Prior to
upgrading I ran zttest and observed the results
.they were something like an
average of 99.96XX
which is below what digium is recommending. So I went and
upgraded. I tested the phone for a little over 20 minutes and it never cut
out or went static one single time, however, it was making a beeping type
sound in the background. It was sporadic and varied in volume.  I have no
idea what is causing it, but at the moment I?m quite relieved that it?s no
longer(crossing my fingers) cutting my phone calls off. I ran a zttest on
the new box and the outcome was much better, 99.987 for most of them, an
occasional 100% and sometimes it would dip down an go to 2%, 40%, 70%,ect.
But the test ended and the average was above 99.98. This whole damn thing is
quite frustrating, more so for you I can imagine. I hope we?re closer to a
solution now. Have you seen anyone else on the list that has found a cure or
workaround? BTW, I was running samba and I stopped the service, but the
static continued. (We thought Samba might be part of the problem as my
TCPDUMP showed netbios activity at the exact time the line went south...no
dice though)


Update further...The first conversation on the phone had the beeping as
described above, it occurred throughout the conversation. All of the
subsequent calls made (about 5, all less than 5 minutes) have been crystal
clear and I couldn't tell the difference from that or my POTS phone
connected to the local loop. 

I do have a concern though, if the TDM400 is so seemingly problematic, what
else could one use to connect multiple analog phones to the box??? 


Cheers,

?
Paul Shiflet


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That is very interesting stuff!!!

I've experienced, and still continue to experience, the "line
noise" issue,
as well as the beeping issue.. The beeping issue took one of the people I
was talking to by surprise, he thought the conversation was being recorded..

I have 3 X101P cards for my 3 inbound POTs lines, and I have 3 SPA-2000's
connected to my local lan, along with 3 Grandstream Budgettone 100 IP
phones, and a remote SPA-2000 at a friends house in a different state.

The whole system is running on an older dual processor PII 450Mhz machine
with SCSI drives.. 512Mb ram.The system runs RH9 with asterisk version

Asterisk CVS-HEAD-03/26/05-17:05:44 built by root@rusty.superdata.com on a
i686 running Linux

Please keep me up-to-date on if this permanetly solves your problem(s), as I
can certainly throw more hardware at this if needed!!!

Thanks,
      - Andre

-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com]On Behalf Of Paul
Sent: Wednesday, April 20, 2005 12:52 PM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: [Asterisk-Users] Line Noise UPDATE - If you've got line
noise,read this


This is an update to the message title LINE Noise HELP! Regarding the static
that floods the line and makes continuing a conversation impossible. This
was happening on my SIPura-841, but Damian on the list was experience this
same problem with POTS phones as well through his TDM400. Below is an
excerpt of what I recently sent to Damian as we've been trying to figure
this out.


Well here?s the deal with my box. I had a Celeron 400 w/ 128mb of ram and an
UATA66 HD. I finally got fed up with the static on the phone(because it
would basically cut the conversation off), so I went out and bought a brand
new system. Sempron 3000+, 512MB pc3200, 160GB UATA100
..fresh install of
asterisk and zaptel and RH9. I have two X100P FXO cards in my box. Prior to
upgrading I ran zttest and observed the results
.they were something like an
average of 99.96XX
which is below what digium is recommending. So I went and
upgraded. I tested the phone for a little over 20 minutes and it never cut
out or went static one single time, however, it was making a beeping type
sound in the background. It was sporadic and varied in volume.  I have no
idea what is causing it, but at the moment I?m quite relieved that it?s no
longer(crossing my fingers) cutting my phone calls off. I ran a zttest on
the new box and the outcome was much better, 99.987 for most of them, an
occasional 100% and sometimes it would dip down an go to 2%, 40%, 70%,ect.
But the test ended and the average was above 99.98. This whole damn thing is
quite frustrating, more so for you I can imagine. I hope we?re closer to a
solution now. Have you seen anyone else on the list that has found a cure or
workaround? BTW, I was running samba and I stopped the service, but the
static continued. (We thought Samba might be part of the problem as my
TCPDUMP showed netbios activity at the exact time the line went south...no
dice though)


Update further...The first conversation on the phone had the beeping as
described above, it occurred throughout the conversation. All of the
subsequent calls made (about 5, all less than 5 minutes) have been crystal
clear and I couldn't tell the difference from that or my POTS phone
connected to the local loop.

I do have a concern though, if the TDM400 is so seemingly problematic, what
else could one use to connect multiple analog phones to the box???


Cheers,

?
Paul Shiflet


_______________________________________________
Asterisk-Users mailing list
Asterisk-Users@lists.digium.com
http://lists.digium.com/mailman/listinfo/asterisk-users
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

On April 20, 2005 12:51 pm, Paul wrote:
> asterisk and zaptel and RH9. I have two X100P FXO cards in my box. Prior to
The X100P cards are nasty.  The X101Ps aren't much better IMO.  In my 
experience I've never had good luck with multiple cards in one system. 
I'd
try a TDM02P (the normal and supported equivalent).  The fact that a totally 
new system didn't do anything to help either indicates that it's outside
your
system (is your network busy during office hours and not afterward?  Flood 
the network after hours with similar traffic and see if the results are the 
same) or even outside of the office (are these calls going through FXO or out 
to VOIP termination?)...  

I know the last thing you want to do right now is spend more money.  perhaps 
if you contact Digium you might be able to get a 15 or 30 day money back 
trial.  

That brings up the question -- have you contacted Digium for support?  They do 
support their cards very well.
> I do have a concern though, if the TDM400 is so seemingly problematic, what
> else could one use to connect multiple analog phones to the box???
I've not heard of problematic TDM after the latest rev (H) of the TDM card
and
the latest rev (unsure of the identifier) of the FXO modules.

-A.