Anyone had any luck configuring the IP6000 to use as SIP on 5000? This is a clients existing phone and I haven't been able to replace the settings. It looks like I can view current settings from display at MENU/STATUS/LINES, but can't change them there. I know there's a web interface but I can't login there as Administrator pass 456 or Polycom pass 456, but 456 seems to work from keyboard menu. Theoretically there's a doc at the Mitel SIP COE, but I've never been able to actually find any of those docs (11-4949-00157 or 11-4940-00158).