Thank you very mutch Philip, i'll use these commands and get back with the output. <br><br>
<div class="gmail_quote">2010/3/26 Philipp von Klitzing <span dir="ltr"><<a href="mailto:klitzing@pool.informatik.rwth-aachen.de">klitzing@pool.informatik.rwth-aachen.de</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Hi!<br>
<div class="im"><br>> it should be some commands that can give me a better idea about the<br>> codecs, if anyone know them, please help!<br><br></div>Use "sip show channels" and "iax show channels" and look at the Format<br>
column.<br><br>About the Polycom devices: Others will have to help you there. I have no<br>good guess why you might have the issue only on speakerphone, but not in<br>handset mode. Could it maybe be some kind of electrical grounding issue<br>
(instead of something caused by transcoding)?<br>
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<div class="h5"><br>Philipp<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>
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