Large clients with growing businesses need the ability to modify the length of their extensions from, for example, 3-digits to 5-digits. In addition, some clients are required to not recycle/reassign extension numbers of departed employees, resulting in many more extension in the database than in production. Please consider a process (even for a fee!) that enables the conversion of a 3-digit PBX to a 4 or 5-digit PBX. thanks.