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Crackling and Popping noises


Ringside
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We have replaced our allworx-6x with the CS410.

Once we went to 2.1.6.2448 on the black box, things have been much more stable.

 

But, we have an intermittent noise problem.

It happens both on the one analog POTS line we have, as well as the SIP trunks with Callcentric.

We are using Snom-360 and linksys SPA942...both phones seem to have the noise but the linksys is worse.

If I transfer the call from the Linksys to the Snom, the popping will also transfer.

 

It is a loud Crackling, Popping sound.

It is consistent during a single call, but may disappear on the next call.

Any ideas?

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We have replaced our allworx-6x with the CS410.

Once we went to 2.1.6.2448 on the black box, things have been much more stable.

 

But, we have an intermittent noise problem.

It happens both on the one analog POTS line we have, as well as the SIP trunks with Callcentric.

We are using Snom-360 and linksys SPA942...both phones seem to have the noise but the linksys is worse.

If I transfer the call from the Linksys to the Snom, the popping will also transfer.

 

It is a loud Crackling, Popping sound.

It is consistent during a single call, but may disappear on the next call.

Any ideas?

 

The gain adjustment was a little bit buggy on the 2.1 version. There is a new version http://www.pbxnsip.com/cs410/update-2914.tgz that should be better with the gain.

 

If you want to be able to move back to the old state, just make a backup of the /pbx directory before doing the upgrade.

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  • 2 weeks later...

3.0.0.2914 (Linux)

Ok, I see lots of gain adjustment with the gateway.

I lowered the gain to -14db, and it was better.

Since I went that low I figured it could be a line problem...good levels, but bad gain.

So I opened a ticket with the phone company as it sounded like the lines were overdriven.

They bypassed the SLIC and connected us directly to the switch.

Levels dropped on the line, and seems to have helped with the static popping.

We now have a PBXnSIP gateway level of -6Db

 

Problem still exists, even when we use the ITSP lines over the internet... no Gateway involved.

Usually we can trace the static to some kind of feedback when we talk.

When just listening, it does not appear to happen.

As soon as you talk, the static feedback comes out the speaker.

Handset and speaker are about the same.

 

I just did a small doctor's office with Allworx because this CS410 still buggy.

I am now quoting a 65-person Doctor's office.

I don't know if this is PBXnSIP code issue, or the CS410 appliance issue.

please give me your thoughts...I have to get this thing stable before I can sell it....or forget about the appliance all together and go with stand-alone gateway.

 

Thanks

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System Status Overview

Please use the information on this web page when you address the support.

Version: 3.0.0.2914 (Linux)

License Status: Appliance Key

License Duration: Permanent

Additional license information: Extensions: 10/32 Accounts: 17/40

Working Directory: /pbx

MAC Addresses: 001915683FD8 001915683FD9

Calls: 1/0 (CDR: 1) 0/0 Calls

SIP packet statistics: Tx: 208 Rx: 203

Emails: Successful sent: 0 Unsuccessful attempts: 0

Available file system space: 70%

Uptime: 0 00:25:28 (1907 2284096-0) WAV cache: 0

Media CPU Usage: 100%

0%

0 24

 

 

Also,

 

Since we did the software upgrade, we have had stability issues again.

Also had a couple calls just simply drop.

Then I could not place a call...went off hook and it was just dead air.

The system is locking up...no access to logging in on the Gui.

I had to manually unplug the unit, and cycle power...then everything worked great again.

I made sure to turn off all logging.

 

I see another version of code but would like to know this problem was duplicated before I just jump to another version.

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I would try to upgrade to version 2933 (http://www.pbxnsip.com/cs410/update-2933.tgz). The version that you are using has a bug in the setting of the gain (it sets some other gain that actually can easily cause distortion).

 

Also, you should check the phones audio level again. Usually, users increase the volume of their phone when the gain is too low, and after changing the gain back to normal the phones are too lound and generate echo.

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