He knew from his extensive knowledge of phone company operations and procedures that he'd need to reach a department called the Recent Change Memory Authorization Center or RCMAC (I will always wonder who makes up these names!). He began by calling the phone company Business Office, said he was in Repair and needed to know the number for the RCMAC that handled the service area for the area code and prefix he gave, which was served out of the same central office for all the telephone lines in the detention center. It was a routine request, the kind provided for technicians out in the field in need of some assistance, and the clerk had no hesitation in giving him the number.