Dear List, Has anybody done any tests on sip hardphones quantitatively measuring the MOS and TELR value. I am doing some type approval testing and one of the requirements is that the measured echo is <= -25dB with a MOS value of 3.5. I dont know whether this -25dB value is fictitious or unachieveable or is there any settings that you need to do on asterisk side to attain that magic number Regards Rosli -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20061004/801cf88c/attachment.htm