I am working with a SX-200 ICP CXi controller, and when I put calls on hold from a set, it is if they are on exclusive hold, that is, the set you put them on hold from is the only set that can pick up the call off of hold. When you press the hold key, the display says "ok select line". Not sure what it is asking for, but I want to be able to put the call on hold and then select the line from another phone to take the call off of hold.