Our reps say there is no way to make this work correctly but I think there has to be a way. At the bottom of the phone we have three buttons...top two are labeled ICM (multicall??) and bottom one is our 4 digit extension. When a call comes in and we answer it ...the extension number changes to the callers ID. If another call comes in we can't see who is calling..But say a call comes in and I press a ICM (I guess this is multicall button) button...next call comes in I can see who it is.
Also when I answer on my extension button it changes to display the caller...but if I answer on an ICM (multicall) button it doesn't change to display the caller. We would like all three buttons to be able to display the caller when answered and display the next call coming in when already on a line.