we are getting one of these units on service, the simm card is already missing. has anyone been servicing one of these units without the simm, and without a CADI Tool? What does the CADI tool do? The owner is aware we may have trouble without the above items. is it true you cannot see all faults, nor see all of the Input and outputs without the simm. if we had the simm, is the CADI Tool absolutely necessary? Also, I have a print, but no manual, anybody have a manual in pdf form they would like to share, give me a pm. thanks