I've programmed a separate "department" called I-CALL and added a channel called I-CALL with the TG of i0 on an EDACS system. However, when I am locked on a completely separate department, I am still getting I-CALLs coming through. ID search is turned off for the system. Interestingly enough, the department is displayed as "unknown" when an I-CALL comes through when I'm holding on a different department. This is more of an annoyance at this point as there are not rempant I-CALLs on the system, but I could see it being a real P.I.T.A if you're trying to monitor a specific department and you keep getting I-CALLs from other unrelated users.