I have a customer that has a PRI on an NEC IPK system that has (4) different companies under roof involved in this system and I have programmed Car keys to show the incoming calls with Cap keys on Buttons 1-8 but the caller ID does not show up when Incoming calls come in. I must mention that we are also overriding the caller ID with each company within the PRI (memory block 3-52). We have DTU-16d telephones that have (4) car keys (to show which company is being called on incoming calls) and (4) keys programmed on each telephone (for trunk access to the groups) to each telephone for the customer for outgoing calls so they do not have to remember to dial 8,9,70,71 to access each company's group outgoing caller ID. The employees represent all of the companies so I can't use memory block 4-62 in this case. Is this the proper way to do this or am I missing something ? Thanks for your help.