[Freeswitch-users] Linksys PAP2-T and echo

[Boris Kovalenko]

Hello!

     Darcy, what is your firmware? 5.1.6?

> Here are the settings from a gateway in the field, we have about 200 of them
> installed with no echo compliants
>
> fax port gain, in and out   -2
> set
> echo canc enable yes
> echo canc adapt enable yes
> echo supp eanble yes
>
> Also, set silence supp enable to yes
>     and silence threshold to medium.
>
> Give that a try, I find it works quite well.  These adapters are service by
> a freeswitch with a 729 license.
>
>
> -----Original Message-----
> From: Boris Kovalenko
> Sent: Monday, October 31, 2011 12:42 PM
> To: FreeSWITCH Users Help
> Subject: Re: [Freeswitch-users] Linksys PAP2-T and echo
>
> Hello!
>
> Steve, Darcy, I've played ... no success :( Setting FXS to -15 do echo
> acceptable but I still can hear it. So there is no way to eleminate echo
> with Linksys devices? Only to buy more professional devices like Addpac?
>> on your pap2t web interface, go to voice, advanced, select the line, the
>> settings below will allow you to play with echo cancellation.  However,
>> you
>> also need to go the the regional tab in voice and play with the fxs input
>> and output gains, the voice gain on the pap2t or any linksys gateway, will
>> impact the echo on the line.  This is most likely where your problem is.
>> You might not be able to cure the echo on every call, but you should be
>> able
>> to make it acceptable.
>>
>> Darcy
>>
>>
>> Audio Configuration
>> Preferred Codec:        Second Preferred Codec:
>> Third Preferred Codec:        Use Pref Codec Only:
>> Silence Supp Enable:        Silence Threshold:
>> G729a Enable:        Echo Canc Enable:
>> G723 Enable:        Echo Canc Adapt Enable:
>> G726-16 Enable:        Echo Supp Enable:
>> G726-24 Enable:        FAX CED Detect Enable:
>> G726-32 Enable:        FAX CNG Detect Enable:
>> G726-40 Enable:        FAX Passthru Codec:
>> DTMF Process INFO:        FAX Codec Symmetric:
>> DTMF Process AVT:        FAX Passthru Method:
>> DTMF Tx Method:        DTMF Tx Mode:
>> DTMF Tx Strict Hold Off Time:        FAX Process NSE:
>> Hook Flash Tx Method:        FAX Disable ECAN:
>> Release Unused Codec:        FAX Enable T38:
>> FAX T38 Redundancy:        FAX Tone Detect Mode:
>>
>> -----Original Message-----
>> From: Steve Underwood
>> Sent: Monday, October 31, 2011 11:11 AM
>> To: FreeSWITCH Users Help
>> Subject: Re: [Freeswitch-users] Linksys PAP2-T and echo
>>
>> On 10/31/2011 10:58 PM, Boris Kovalenko wrote:
>>> Hello!
>>>
>>>
>>>         I'm wondering if it is possible to solve echo with Linksys PAP2-T
>>> devices. Does anybody here uses it? I read many articles and still can't
>>> understand how to eleminate echo :( I read
>>> http://www.voip-info.org/wiki/view/Asterisk+echo+cancellation and found
>>> that Asterisk has its own EC. Does Freeswitch has it too? I found this
>>> article http://docs.freeswitch.org/echo_can_page.html but can't
>>> understand - has Freeswitch EC or not? If yes - how to turn it on and
>>> off?
>> Neither Asterisk or Freeswitch will echo cancel your PAP2T. Echo
>> cancellation over IP is very problematic, and hardly ever attempted. The
>> PAP2T should be echo cancelling for itself, and they usually do a fairly
>> good job of this. I don't think it is configurable. Its always on.
>>
>> Steve
>>
>>
>>
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>>
>>
>>
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>


-- 
Regards,
Boris