We have a norstar MICS 6.1 with analog DID lines and POTS service. The target lines for the DID appear on individual phones and on the receptionist phone. A couple of managers have DND on Busy:Y so that if they are on the phone, their phone will not ring. However if they are on the phone or put a call on hold, they cannot receive a transferred call to them. The receptionist is telling me that the display says the transfer does not go through, it says the manager phone is busy.

Is this an issue of getting DND set to N or is it something else. Not sure where to start.