Thanks for the reply. The technician said that the Lingo is not compatible with my Mitel 200sx pbx. He said that no mitel models are compatible because there are no 4 digit Mitel integration "Lingo" codes listed in the technician guide. I have a hard time believing this to be the case, as Mitel certainly was a very popular pbx during the time the Lingo was released, and my VERY old Repartee unit had no problem connecting to the Mitel. Do you think even though there isn't a Mitel coded listed, there is a compatible code that might be sort of "universal"?
