Hi,<br><br><br>are you using PoE or power supplies? <br>As power supllies usually are not grounded it could be that it's comming from the power source.<br><br>You could try using a grounded PoE switch or probably a power backup to test if this is the case.
<br><br><br>Cheers<br><br>Tim<br><br><div><span class="gmail_quote">On 3/30/07, <b class="gmail_sendername">Louis-David Mitterrand</b> <<a href="mailto:vindex+lists-asterisk-users@apartia.org">vindex+lists-asterisk-users@apartia.org
</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hello,<br><br>We are at wit's end on this. One (and only one) of our five asterisk
<br>installation is giving us real headaches. Buzzing and/or choppy sound<br>interfere with conversations. I recorded some conversations with<br>monitor() and no problem whatsoever appear in the recording, while the<br>local user was hearing the buzz and half my words.
<br><br>This is a 1.2.16 installation with mISDN but mostly using SIP to our<br>central PRI-equipped asterisk. Phones are Polycom 430, 601, Cisco 7960,<br>7912 all to the latest firmware.<br><br>We tried everything: changing the switch, network cards, auditing every
<br>network drop with fluke, re-certifying our wan, swapping some phones to<br>no effect.<br><br>Has anyone gone through that ordeal?<br>_______________________________________________<br>--Bandwidth and Colocation provided by
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</a><br></blockquote></div><br><br clear="all"><br>-- <br>---------------------------------------------------<br>snom technology AG<br><br>Tim Koehler <br>Partner Manager