Does anyone have a how to guide from Mitel about installing Cisco phones on 3300 or have experience with installing them. Just a few things I need help with. I have a Cisco CP-6921 which is a 2 line phone. I have the firmware upgraded to Sip and the SEPmac config file loaded. The phone works great with one button... however I am trying to register 2 lines on the phone, first I tried registering the same extension twice and I get the following message on the phone...Unable to create call; Maximum number of calls for this line have been reached...so I tried to register another extension number on button 2 and get the same message. Just wondered if it may be the way I set up the SEPmac file. Also the MWI will not work. I have the MessageWaitingLampPolicy set to 1 which I believe is light the lamp and give prompt on display. I have a Aastra phone registered on same extension (not plugged up at same time and the MWI works...just to show the light is coming through to registered phone. Any help greatly appreciated