Is there any possibility of DAHDI supporting Automatic gain control on TDM ports? I'm having issues at a couple of offices where calls made to local numbers are fine but a when a calls from or goes to a large percentage of long-distance or 1-800 numbers the person at the remote end cannot hear the person in my office. Boosting the gains in zapata.conf (I'm still using 1.4.21) to 8 solves the problem with long-distance lines, but then local calls say the person in my office is too loud. I understand that it is going to be difficult to reliably detect a major drop in the volume at the far end of the call, but I'm just wondering if there is a good solution for this. We're using Rhino WC4-FXO-ec cards and the OSlec echo canceler (since the on-board echo canceler didn't seem to help our echo issues) Thanks, Brent
2009/7/7 Brent Davidson <brent at texascountrytitle.com>> Is there any possibility of DAHDI supporting Automatic gain control on > TDM ports? I'm having issues at a couple of offices where calls made to > local numbers are fine but a when a calls from or goes to a large > percentage of long-distance or 1-800 numbers the person at the remote > end cannot hear the person in my office. Boosting the gains in > zapata.conf (I'm still using 1.4.21) to 8 solves the problem with > long-distance lines, but then local calls say the person in my office is > too loud. >> > I understand that it is going to be difficult to reliably detect a major > drop in the volume at the far end of the call, but I'm just wondering if > there is a good solution for this. We're using Rhino WC4-FXO-ec cards > and the OSlec echo canceler (since the on-board echo canceler didn't > seem to help our echo issues)hello, I'm afraid I can't be of any help but as a first step, I'm wondering if there's a way to translate user experience such as "too loud" into figures such "volume is 8" ?> > Thanks, > Brent > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20090708/01e1f531/attachment.htm
> 17. Automatic Gain Control (Brent Davidson)> Is there any possibility of DAHDI supporting Automatic gain control on > TDM ports?Have a look at asterisk-1.6.1 and module func_speex.so, which provides AGC function. This function can be applied to any channel. Documentation: http://www.voip-info.org/wiki/view/Asterisk+func+speex and *CLI> core show function AGC Hope it helps Lukas
If you are using a large number of DAHDI channels, you could designate a chunk of them as "non-local" since you can control RXGAIN on each channel. You would have to work out something with your TELCO since your'e a dead duck control-wise once you answer the call. -----Original Message----- From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Brent Davidson Sent: Tuesday, July 07, 2009 10:26 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [asterisk-users] Automatic Gain Control Is there any possibility of DAHDI supporting Automatic gain control on TDM ports? I'm having issues at a couple of offices where calls made to local numbers are fine but a when a calls from or goes to a large percentage of long-distance or 1-800 numbers the person at the remote end cannot hear the person in my office. Boosting the gains in zapata.conf (I'm still using 1.4.21) to 8 solves the problem with long-distance lines, but then local calls say the person in my office is too loud. I understand that it is going to be difficult to reliably detect a major drop in the volume at the far end of the call, but I'm just wondering if there is a good solution for this. We're using Rhino WC4-FXO-ec cards and the OSlec echo canceler (since the on-board echo canceler didn't seem to help our echo issues) Thanks, Brent _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users