Abstract: An expandable office system is disclosed with one or more client units; a base unit (BU) having a predetermined hardware design acting as a base device to provide server operation; one or more network devices having the predetermined hardware design to operate in conjunction with the base unit to expand service to the one or more client units, the network device selected from a group consisting of: a second network unit having the predetermined hardware design coupled to the first unit and serving as a mirror unit under software configuration, wherein the second unit is added as a mirror unit (MU) to back up the first unit as a server; a third network unit having the predetermined hardware design coupled to the first unit and serving as an expansion unit (EU) under software configuration, wherein the third unit is added as needed to increase client capacity; and a fourth network unit having the predetermined hardware coupled to the first unit and located at a remote location from the first network unit, and w