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 FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

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

FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

-- С уважением, Борис Коваленко ЗАО "Тагнет" тел. +7 (3435) 230001 факс +7 (3435) 230005 FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

Yes, if it is older we always upgrade it to the 5.1.6. Also, when we do get an area where the echo is a little more difficult to cure, we use the spa2102, I do not know why but it seems to have more processing power, the fact that it will do t38 when the pap2t does not is probably an indication of the difference in two. Darc y -----Original Message----- From: Boris Kovalenko Sent: Monday, October 31, 2011 10:41 PM To: FreeSWITCH Users Help Subject: Re: [Freeswitch-users] Linksys PAP2-T and echo 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

FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

-- Regards, Boris FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I use Fax on PAP2T with FS successfully for a while now. My Config is like this: Fax on LINE 1 Preferred Codec = PCMA aka G711a // Valid for Germany ;) Use Pref Codec Only: yes FAX process NSE: no FAX Disable ECAN: yes Silence Supp Enable: no Echo Canc Enable: no Echo Canc Adapt Enable: no FAX CED Detect enable: no FAX CNG Detect enable: no FAX Passthrough Codec: G711a FAX Passthrough method: None Call Waiting Serv: no Network Jitter: high Jitter Buffer Adjustment: up and down On the Regional page: All three Polarities: Forward FXS Port Input gain: -3 FXS Port Output Gain: -3 FXS Port power Limit: 3 FXS Port Impedance: 600 //Germany :) More Echo Suppression: no That works on my side. Am 01.11.2011 15:11, schrieb Boris Kovalenko:

Hello!

Played various parameters and echo still here. In other ways but still here. With silence suppression the echo persist if there is doubletalk. If only one is speaking there is no echo. The only what helps - I set FXS output to -15 and echo is gone. But remote party is quietly.

...

Yes, if it is older we always upgrade it to the 5.1.6. Also, when we do get an area where the echo is a little more difficult to cure, we use the spa2102, I do not know why but it seems to have more processing power, the fact that it will do t38 when the pap2t does not is probably an indication of the difference in two.

regards helmut -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk6wKDYACgkQ4tZeNddg3dxL0ACcDn/1gXS6kL4yQ1F5Gsb8JMA0 +wIAnjZLeK1ZCF4PL5xsmy20dLiqe3jq =lLQk -----END PGP SIGNATURE-----

Hi, The echo canceller in the SPA3102 is a disaster, but the ones in the PAP2T and SPA2102 shouldn't give you problems. If you use the default gains you shouldn't really notice echo. If you set some wild gains you might bee poor results. Are you sure the echo originates from the PAP2T, and not some other part of the signal chain? Steve On 11/01/2011 12:42 AM, Boris Kovalenko wrote:

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

FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org

Hi Boris, what kind of analogue handsets do you have attached to the PAP2-T's? I have found with other ATA's (mostly Grandstreams) that it is the impedance settings for the handset that contributes the most to echo. Different handsets can be seup for different countries and sometimes you have to adjust the ATA to match. Regards Brian On 01/11/2011 02:39, Boris Kovalenko wrote:

Hello!

Steve, my configuration is:

PAP2-T (A) ---- FreeSwitch --- PAP-2T (B) I tried Freeswitch in all modes: default, proxy_media, bypass_media. The echo is always present. User A hears its own echo, and user B hear its own.

...

Hi,

The echo canceller in the SPA3102 is a disaster, but the ones in the PAP2T and SPA2102 shouldn't give you problems. If you use the default gains you shouldn't really notice echo. If you set some wild gains you might bee poor results. Are you sure the echo originates from the PAP2T, and not some other part of the signal chain?

Steve

On 11/01/2011 12:42 AM, Boris Kovalenko wrote:

...

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