<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Rene,<BR><DIV><BR class="khtml-block-placeholder"></DIV><DIV>We are using the 5220 with Asterisk with no problems. The current firmware for the phone is 3.1.0.10, which you can download from </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><A href="http://sipdnld.mitel.com">http://sipdnld.mitel.com</A>/</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>If you post your sip.conf file we can see if there's any errors.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Cheers</DIV><DIV>Rob</DIV><DIV><FONT class="Apple-style-span" face="Helvetica" size="3"><SPAN class="Apple-style-span" style="font-size: 12px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV></BODY></HTML>