<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Carlos,</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span>Echo might be a possible cause of the noise but it is strange you hear it also on internal calls since they have very low latency.</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style:
normal;"><span>Can you record a short sample with this noise or at least ask your customer to provide a more detailed description of the noise ?</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span></span></div><div><span></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Carlos Chavez <cursor@telecomabmex.com><br> <b><span style="font-weight: bold;">To:</span></b> asterisk-users@lists.digium.com <br>
<b><span style="font-weight: bold;">Sent:</span></b> Wednesday, November 14, 2012 12:45 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [asterisk-users] Noise on phones while speaking...<br> </font> </div> <br>On 11/13/12 4:31 PM, Mark Engelhardt wrote:<br>> Carlos,<br>><br>> I think the noise you are hearing might echo cancelation that is broken or set incorrectly. Maybe the card and asterisk are both trying to echo cancel?<br>><br>> Mark<br>><br>> On Nov 13, 2012, at 1:52 PM, Carlos Chavez wrote:<br>><br>>> I have a new install and the customer is complaining that they hear noise on all calls, no matter if it is internal or external, desk phones or softphones. The noise is only present when the user is speaking, not the remote side. The remote side does not hear the noise, only the local user.<br>>><br>>> We are using Asterisk .1.8.11-cert8 on a CentOS
6 machine with a Digium AEX800 card and DAHDI 2.6.1. I really do not know how this noise is generated. Where can I look? Why would a SIP to SIP call have this noise?<br>>><br>>><br> The card itself does not have hardware echo cancellation so we use <br>MG2. I am not fixated on the card because this should not affect a SIP <br>to SIP internal call unless the card is really defective and provides <br>bad timing to Asterisk.<br><br>-- <br>Telecomunicaciones Abiertas de México S.A. de C.V.<br>Carlos Chávez Prats<br>Director de Tecnología<br>+52-55-91169161 ext 2001<br><br><br>--<br>_____________________________________________________________________<br>-- Bandwidth and Colocation Provided by <a href="http://www.api-digital.com/" target="_blank">http://www.api-digital.com</a> --<br>New to Asterisk? Join us for a live introductory webinar every Thurs:<br> <a
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