I am working with a customer site where there is an SX2000 connected to a Dialogic D/120 JCT board. I have a few questions that someone may answer for me. What I am looking for is how too get the Dialogic board to recognize that the Mitel analog set has hung up the call? Some systems send a loop current drop and some (such as Nortel) send a disconnect tone. What does Mitel do? I am still trying to get this site to tell me what kind of hardware they are using. I also know nothing about Mitel (I'm an old Nortel guy) so any response will need to be pretty specific. Thanks in advance.