I am trying to get a Mediatrix 4102 to registrar to the mitel 3300 MXe III, MCD 5.0 software via SIP lines. I have Mitels intructions from when they tested back on 8.0 software. I have the mediatrix plugged into the L2 port on the Mitel but i am unable to get the registration to happen. I have tried this on two different systems and logs from either end show nothing, no attempts to registrar? Anyone with an idea?