<div>We have this from time to time. It's usually someone using a cheap headset that's turned up too high. Polycom's have some settings you can tweak to cancel out the echo, although they're not supported. We used them for a short while, but they seemed to interfere with the echo can on our Sangoma card, so we had to set them back to default.
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<div>You might want to see if Aastra phones offer some type of internal echo can, if there are cheap headsets being used (the person not hearing the echo should turn his/her volume down), or if there's one phone in particular causing problems (could be a bad network cable or NIC on the phone).
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<div><span class="gmail_quote">On 1/23/07, <b class="gmail_sendername">Carlos Chavez</b> <<a href="mailto:cursor@telecomabmex.com">cursor@telecomabmex.com</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> I have a customer running Asterisk 1.2.13, Zaptel 1.2.11 with a TE110P,<br>a TDM04B and an Astribank-32. They have been complaining that there is
<br>echo on calls even when they are IP to IP on the same network. There<br>are 18 Aastra 9133i phones and 30 analog phones connected to the<br>Astribank. I can understand there being a bit of echo on the analog<br>phones, but I do not understand why there would be echo on the SIP
<br>phones when they are all using ALAW/ULAW and are on the same local<br>network. I even have QoS configured on the Linksys SRW224P switch to<br>give priority to the voice services.<br><br>--<br>Telecomunicaciones Abiertas de Mexico
S.A. de C.V.<br>Carlos Chávez Prats<br>Director de Tecnología<br>+52-55-91169161 ext 2001<br><br><br>_______________________________________________<br>--Bandwidth and Colocation provided by <a href="http://Easynews.com">
Easynews.com</a> --<br><br>asterisk-users mailing list<br>To UNSUBSCRIBE or update options visit:<br> <a href="http://lists.digium.com/mailman/listinfo/asterisk-users">http://lists.digium.com/mailman/listinfo/asterisk-users
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