Hi,
Latest FW for ELU31 is R11A, Try to upgrade that as well..
Also in recent time , I have seen DECT telephony in MD 110 is very sensitive for clocking... In latest installation I put the ELU 31 on the magazine where I was getting the Sync from PSTN... & Guess, it worked without any hassle...
Cheers,
""The truth about action must be known and the truth of inaction also must be known; even so the truth about prohibited action must be known. For mysterious are the ways of action""