Hello all, I'm looking to troubleshoot some echo issues and possibly "studdering" while using the speakerphone with the Intellitouch ITC3002. On the hardware end, i have a 2621 setup as the router with some policy maps for qos, and a 2900XL with cos priority set to 5. I have setup created 2 vlans currently (really small office), 1 for corp/data, and 2 voice vlan. Asterisk is on the 2nd vlan as well as the phones and i have the 2621 doing intervlan routing. Currently we have VOIP calls coming in and out, but when calls are placed and speakerphone is utilized, the FAR end hears echo of themselves. This would happen regardless of who placed the call. Any ideas on where i can start cutting down the echo problem? The phones come with echo-cancellation and is turned on. Thephones also have VAD but is currently not on. Would this make a difference while utilizing the speakerphone? Terrelle
Colin Anderson
2006-Jun-23 10:59 UTC
[Asterisk-Users] troubleshooting echo on speakerphone
Sounds like a reflection echo i.e. the customer's voice is coming out of the speaker, hitting a flat wall, and is being picked up by the mic on the speakerphone. Try attenuating the microphone, or to test for it, move the speakerphone to a smaller room or one with fabric walls like a cubicle. Dollars to doughnuts, it goes away. As to the stuttering, it is most likely because the audio is being suppressed during speech or turned to half-duplex, which speakerphones are notorious for. Speakerphones, voip or not, are tricky beasts and I try to discourage their use amongst my users whenever possible. I personally dislike speakerphones; I consider them rude. -----Original Message----- From: T. Shaw [mailto:xytek@hotmail.com] Sent: Friday, June 23, 2006 11:48 AM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] troubleshooting echo on speakerphone Hello all, I'm looking to troubleshoot some echo issues and possibly "studdering" while using the speakerphone with the Intellitouch ITC3002. On the hardware end, i have a 2621 setup as the router with some policy maps for qos, and a 2900XL with cos priority set to 5. I have setup created 2 vlans currently (really small office), 1 for corp/data, and 2 voice vlan. Asterisk is on the 2nd vlan as well as the phones and i have the 2621 doing intervlan routing. Currently we have VOIP calls coming in and out, but when calls are placed and speakerphone is utilized, the FAR end hears echo of themselves. This would happen regardless of who placed the call. Any ideas on where i can start cutting down the echo problem? The phones come with echo-cancellation and is turned on. Thephones also have VAD but is currently not on. Would this make a difference while utilizing the speakerphone? Terrelle _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Colin Anderson
2006-Jun-23 11:45 UTC
[Asterisk-Users] troubleshooting echo on speakerphone
Different room. Different acoustic characteristics. -----Original Message----- From: T. Shaw [mailto:xytek@hotmail.com] Sent: Friday, June 23, 2006 12:21 PM To: asterisk-users@lists.digium.com Subject: RE: [Asterisk-Users] troubleshooting echo on speakerphone ok, ill try that as well. Funny thing is i don't have these issues using the same phone on my test box at home which is a old 256M Sun Ultra5 connected to a old Netgear Cable/DSL wireless router (can you say 0 (zero) QOS). Terrelle>From: Colin Anderson <ColinA@landmarkmasterbuilder.com> >Reply-To: Asterisk Users Mailing List - Non-Commercial >Discussion<asterisk-users@lists.digium.com> >To: 'Asterisk Users Mailing List - Non-Commercial >Discussion'<asterisk-users@lists.digium.com> >Subject: RE: [Asterisk-Users] troubleshooting echo on speakerphone >Date: Fri, 23 Jun 2006 11:59:03 -0600 > >Sounds like a reflection echo i.e. the customer's voice is coming out of >the >speaker, hitting a flat wall, and is being picked up by the mic on the >speakerphone. Try attenuating the microphone, or to test for it, move the >speakerphone to a smaller room or one with fabric walls like a cubicle. >Dollars to doughnuts, it goes away. > >As to the stuttering, it is most likely because the audio is being >suppressed during speech or turned to half-duplex, which speakerphones are >notorious for. Speakerphones, voip or not, are tricky beasts and I try to >discourage their use amongst my users whenever possible. I personally >dislike speakerphones; I consider them rude. > >-----Original Message----- >From: T. Shaw [mailto:xytek@hotmail.com] >Sent: Friday, June 23, 2006 11:48 AM >To: asterisk-users@lists.digium.com >Subject: [Asterisk-Users] troubleshooting echo on speakerphone > > >Hello all, >I'm looking to troubleshoot some echo issues and possibly "studdering" >while > >using the speakerphone with the Intellitouch ITC3002. On the hardware end, >i > >have a 2621 setup as the router with some policy maps for qos, and a 2900XL >with cos priority set to 5. I have setup created 2 vlans currently (really >small office), 1 for corp/data, and 2 voice vlan. Asterisk is on the 2nd >vlan as well as the phones and i have the 2621 doing intervlan routing. > >Currently we have VOIP calls coming in and out, but when calls are placed >and speakerphone is utilized, the FAR end hears echo of themselves. This >would happen regardless of who placed the call. > >Any ideas on where i can start cutting down the echo problem? >The phones come with echo-cancellation and is turned on. Thephones also >have > >VAD but is currently not on. Would this make a difference while utilizing >the speakerphone? > >Terrelle > > >_______________________________________________ >--Bandwidth and Colocation provided by Easynews.com -- > >Asterisk-Users mailing list >To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >_______________________________________________ >--Bandwidth and Colocation provided by Easynews.com -- > >Asterisk-Users mailing list >To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users_______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
I've not used it with VoIP, but we have a speakerphone which we have used on occasion in a meeting where someone was unable to attend. When it is turned on, it sends out a 'ping' and measures the echo response of the room, and perfectly cancels out all of the echo thereafter, unless it is moved. If it is moved then the echo becomes horrible. A cheaper unit might not do echo cancellation quite as well. James> -----Original Message----- > From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users- > bounces@lists.digium.com] On Behalf Of T. Shaw > Sent: Saturday, 24 June 2006 03:48 > To: asterisk-users@lists.digium.com > Subject: [Asterisk-Users] troubleshooting echo on speakerphone > > Hello all, > I'm looking to troubleshoot some echo issues and possibly "studdering" > while > using the speakerphone with the Intellitouch ITC3002. On the hardwareend,> i > have a 2621 setup as the router with some policy maps for qos, and a > 2900XL > with cos priority set to 5. I have setup created 2 vlans currently(really> small office), 1 for corp/data, and 2 voice vlan. Asterisk is on the2nd> vlan as well as the phones and i have the 2621 doing intervlanrouting.> > Currently we have VOIP calls coming in and out, but when calls areplaced> and speakerphone is utilized, the FAR end hears echo of themselves.This> would happen regardless of who placed the call. > > Any ideas on where i can start cutting down the echo problem? > The phones come with echo-cancellation and is turned on. Thephonesalso> have > VAD but is currently not on. Would this make a difference whileutilizing> the speakerphone? > > Terrelle > > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users