<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This may be an off topic but I’m not sure who else would know the answer. I’m playing around with Asterisk and Polycom phones. I see Polycom supports quite a few codec. The usual ones and these:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>G722 <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Siren14.24kbps Siren22.32kbps<o:p></o:p></p><p class=MsoNormal>Siren14.32kbps Siren22.48kbps<o:p></o:p></p><p class=MsoNormal>Siren14.48kbps Siren22.64kbps<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>G7221.16kbps G7221_C.24kbps<o:p></o:p></p><p class=MsoNormal>G7221.24kbps G7221_C.32kbps<o:p></o:p></p><p class=MsoNormal>G7221.32kbps G7221_C.48kbps<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I can get Asterisk to work with G722 and the sound is superior compared to uLAW. I tried to get it working with Siren7 and Siren14 but I cannot. It always says incompatible codec and what is this Siren14 and Siren22 with Polycom. Is this different to Asterisk’s Siren7 and Siren14? Is this why I cannot get Siren to function?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>siren7 show version : Digium Siren7 Module Version 1.8.0_1.0.5 (optimized for barcelona_64)<o:p></o:p></p><p class=MsoNormal>siren14 show version : Digium Siren14 Module Version 1.8.0_1.0.5 (optimized for barcelona_64)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I found this document : <a href="http://www.polycom.com/global/documents/whitepapers/codecs_white_paper.pdf">http://www.polycom.com/global/documents/whitepapers/codecs_white_paper.pdf</a> which is quite good.<o:p></o:p></p><p class=MsoNormal>It sais:<o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'>G.722.1. Also known as "Siren 7"<o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'>G.722.1 Annex C. Also known as "Siren14”<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This doesn’t explain why the Polycom G7221_C doesn’t work with Asterisk’s Siren14<o:p></o:p></p><p class=MsoNormal style='margin-left:144.0pt;text-indent:36.0pt'>G.722.1 doesn’t work with Asterisk’s Siren7<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Am I just doing something wrong? Is my understand correct?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So what is Siren14 and Siren22 on the Polycom handsets? What does that match to in Asterisk?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td style='padding:0cm 0cm 0cm 0cm'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";mso-fareast-language:EN-AU'>Regards<br><span style='color:navy'>David Klaverstyn</span><br><br><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p></div></body></html>