Rene, 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 http://sipdnld.mitel.com/ If you post your sip.conf file we can see if there's any errors. Cheers Rob -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20050815/2617a028/attachment.htm