I just finished getting a mediatrix 1204 configured, and I tell ya, If you go by mitel's guide, you'll never get there. I have been kinda dissapointed with the last 2 interop documents being about 80-90 percent complete. Are you guys using the Unit Manager Network software to configure the unit? Mitel's knowledgebase docs say to use unit manager express, but the snmp interface is so confusing because there is oh only about 1500 different areas to configure there. My outbound calling seems to work perfect without really changing anything on the unit. I had to find the fxoifans area of the unit to changed the caller ID wait timer but thats about it. The thing still takes close to a good ring and a half before it actually rings the set but otherwise it seems ok.