[asterisk-gui] Echo Canceling

[Andrew Latham]

OSLEC  (open source line echo canceler) = Software Echo Canceler...


~
Andrew "lathama" Latham
Andrew.Latham at TuxTone.com

* Learn more about OSS http://en.wikipedia.org/wiki/Open-source_software
* Learn more about Linux http://en.wikipedia.org/wiki/Linux
* Learn more about Tux http://en.wikipedia.org/wiki/Tux



On Mon, Oct 12, 2009 at 9:35 AM, Bob Crandell <robert at assuredcomp.com> wrote:
> What is OSLEC?
>
> On Sat, Oct 10, 2009 at 7:27 PM, Greg Nutt <gregory at nutt.ca> wrote:
>>
>> I personally ended up removing the hardware canceler from our TDM404E and
>> just used OSLEC.  I tried unsuccessfully for a month to get the hardware
>> canceler to work, but no matter what I still ended up with echo is some
>> scenarios.  OSLEC has been the best solution from my experience.
>>
>> Greg
>>
>> Matt Sales wrote:
>>
>> It has been my experience in the past that running fxotune on your system
>> will clear up most echo issues.  Read more about it here:
>>
>> http://www.voip-info.org/wiki/view/Asterisk+fxotune
>>
>>
>>
>> On Fri, Oct 9, 2009 at 3:58 PM, Bob Crandell <robert at assuredcomp.com>
>> wrote:
>>>
>>> Andrew,
>>>
>>> These are POTS lines.
>>>
>>> If it's glare then what do I change?
>>>
>>> I'm kind of hoping I can make these adjustments in the GUI.  Is it
>>> possible?
>>>
>>> How do you have yours set?
>>>
>>> Thanks
>>>
>>> On Fri, Oct 9, 2009 at 10:55 AM, Andrew Latham
>>> <Andrew.Latham at tuxtone.com> wrote:
>>>>
>>>> Bob
>>>>
>>>> On to the fun topic of audio quality....  The (echo, glare, volume)
>>>> canceler is getting "trained" during your call so that is why it fixes
>>>> its self.  If you are using POTS for your trunk lines then you will
>>>> want to work on the DAHDI/Zaptel settings to resolve any issues.  You
>>>> may be dealing with glare instead of echo.
>>>>
>>>> http://en.wikipedia.org/wiki/Echo_(phenomenon)
>>>>
>>>> To fix you can enable and fine tune settings in your DAHDI/Zaptel
>>>> settings files and restart both Asterisk and DAHDI/Zaptel.
>>>>
>>>>
>>>> ~
>>>> Andrew "lathama" Latham
>>>> Andrew.Latham at TuxTone.com
>>>>
>>>> * Learn more about OSS http://en.wikipedia.org/wiki/Open-source_software
>>>> * Learn more about Linux http://en.wikipedia.org/wiki/Linux
>>>> * Learn more about Tux http://en.wikipedia.org/wiki/Tux
>>>>
>>>>
>>>>
>>>> On Fri, Oct 9, 2009 at 1:43 PM, Bob Crandell <robert at assuredcomp.com>
>>>> wrote:
>>>> > Hi,
>>>> >
>>>> > My next challenge is canceling the echo when I make or receive a call.
>>>> > Right now the echo lasts for the first few seconds after the call is
>>>> > answered then stops.
>>>> > There is no echo when calling an extension.
>>>> > Under Configure hardware is software echo canceller.  I tried a couple
>>>> > of
>>>> > things there that didn't make a noticable difference.
>>>> > Under Advanced Options/SIP Settings there is Jitter Buffer which might
>>>> > have
>>>> > made a tiny difference.
>>>> >
>>>> > What are you guys doing about this?
>>>> >
>>>> > Thanks
>>>> > --
>>>> > Bob Crandell
>>>> > Assured Computing, Inc.
>>>> > 541-868-0331
>>>> > ComputerBase
>>>> > 541-349-0404
>>>> >
>>>> > _______________________________________________
>>>> > --Bandwidth and Colocation Provided by http://www.api-digital.com--
>>>> >
>>>> > asterisk-gui mailing list
>>>> > To UNSUBSCRIBE or update options visit:
>>>> >   http://lists.digium.com/mailman/listinfo/asterisk-gui
>>>> >
>>>
>>>
>>>
>>> --
>>> Bob Crandell
>>> Assured Computing, Inc.
>>> 541-868-0331
>>> ComputerBase
>>> 541-349-0404
>>>
>>> _______________________________________________
>>> --Bandwidth and Colocation Provided by http://www.api-digital.com--
>>>
>>> asterisk-gui mailing list
>>> To UNSUBSCRIBE or update options visit:
>>>   http://lists.digium.com/mailman/listinfo/asterisk-gui
>>
>> ________________________________
>> _______________________________________________
>> --Bandwidth and Colocation Provided by http://www.api-digital.com--
>>
>> asterisk-gui mailing list
>> To UNSUBSCRIBE or update options visit:
>>    http://lists.digium.com/mailman/listinfo/asterisk-gui
>>
>> _______________________________________________
>> --Bandwidth and Colocation Provided by http://www.api-digital.com--
>>
>> asterisk-gui mailing list
>> To UNSUBSCRIBE or update options visit:
>>   http://lists.digium.com/mailman/listinfo/asterisk-gui
>
>
>
> --
> Bob Crandell
> Assured Computing, Inc.
> 541-868-0331
> ComputerBase
> 541-349-0404
>
> _______________________________________________
> --Bandwidth and Colocation Provided by http://www.api-digital.com--
>
> asterisk-gui mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-gui
>