Re: [asterisk-users] Questions on hardware or software-based echo cancellation
2012/1/12, Kevin P. Fleming kpflem...@digium.com: On 01/12/2012 06:39 AM, Olivier wrote: Hi, I'm having some questions related to echo cancellation configuration on a Digium board enabled systems (B410P, TE420, TE420B, ) for cases when a hardware ech canceller is present or not. I read in TEXXX manual that when setting echocancel=yes in chan_dahdi.conf on a VPMOCT64-equiped system, 128ms hardware echo cancellation was enabled. 1. I'm correct thinking that it is then impossible to switch from hardware to software echo can without removing the VPMOCT64 module itself ? 2. Does the same also apply to HA8 and its VPMOCT032 module ? With DAHDI 2.6 (and possibly 2.5), it is possible to override the configuration and apply a software echo canceller to a channel even if it has a hardware one. With prior versions, yes, the echo cancellation module would have to be physically removed (or disabled using a parameter to the kernel module). Then, maybe a line mentioning that in the next User Manual edition would be perfect. Thanks for replying. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Questions on hardware or software-based echo cancellation
On 01/13/2012 02:12 AM, Olivier wrote: 2012/1/12, Kevin P. Flemingkpflem...@digium.com: On 01/12/2012 06:39 AM, Olivier wrote: Hi, I'm having some questions related to echo cancellation configuration on a Digium board enabled systems (B410P, TE420, TE420B, ) for cases when a hardware ech canceller is present or not. I read in TEXXX manual that when setting echocancel=yes in chan_dahdi.conf on a VPMOCT64-equiped system, 128ms hardware echo cancellation was enabled. 1. I'm correct thinking that it is then impossible to switch from hardware to software echo can without removing the VPMOCT64 module itself ? 2. Does the same also apply to HA8 and its VPMOCT032 module ? With DAHDI 2.6 (and possibly 2.5), it is possible to override the configuration and apply a software echo canceller to a channel even if it has a hardware one. With prior versions, yes, the echo cancellation module would have to be physically removed (or disabled using a parameter to the kernel module). Then, maybe a line mentioning that in the next User Manual edition would be perfect. Sure, but you have to understand that the user manuals for our board products are typically only updated when the board itself gets changed; we don't actually deliver DAHDI with the boards, and installation/configuration instructions for DAHDI are primarily included in the manual for user convenience. Users should be aware that they could easily be out of date, and not include all options that are currently offered (although if the user manual's instructions become incorrect, we'll update the manual). Regardless, I'll mention this to the people who manage those products. Thanks! -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] Questions on hardware or software-based echo cancellation
Hi, I'm having some questions related to echo cancellation configuration on a Digium board enabled systems (B410P, TE420, TE420B, ) for cases when a hardware ech canceller is present or not. I read in TEXXX manual that when setting echocancel=yes in chan_dahdi.conf on a VPMOCT64-equiped system, 128ms hardware echo cancellation was enabled. 1. I'm correct thinking that it is then impossible to switch from hardware to software echo can without removing the VPMOCT64 module itself ? 2. Does the same also apply to HA8 and its VPMOCT032 module ? 3. Are the only options for OSLEC configuration the echocancel=128 or echocancel=256 values in chan_dahdi.conf ? 4. How could be compared user experience with oslec/256, mg2/256, mg2/1024 on a HA8 without hardware module ? Which would you recommend ? Regards -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Questions on hardware or software-based echo cancellation
On 01/12/2012 06:39 AM, Olivier wrote: Hi, I'm having some questions related to echo cancellation configuration on a Digium board enabled systems (B410P, TE420, TE420B, ) for cases when a hardware ech canceller is present or not. I read in TEXXX manual that when setting echocancel=yes in chan_dahdi.conf on a VPMOCT64-equiped system, 128ms hardware echo cancellation was enabled. 1. I'm correct thinking that it is then impossible to switch from hardware to software echo can without removing the VPMOCT64 module itself ? 2. Does the same also apply to HA8 and its VPMOCT032 module ? With DAHDI 2.6 (and possibly 2.5), it is possible to override the configuration and apply a software echo canceller to a channel even if it has a hardware one. With prior versions, yes, the echo cancellation module would have to be physically removed (or disabled using a parameter to the kernel module). -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
