A method and apparatus for machine-to-machine communications between a controller and a group of wireless transmitreceive units, each WTRU within the group having a same international mobile subscriber identity. When the bill processing mode is in the counting mode, the different-denomination recognition mode, or the authenticity determination mode, the control unit increases the processing speed by setting the feeding and transporting mechanism to a higher speed than the speed set in the denomination mode. The extrusions and the clips engage in a manner which allows the panels to move in any direction, as needed, without the panel detaching from the structure and falling. The controller is configured to control the operation of the coating unit, the lens curing unit and the post-cure unit. Arm supports extending from the base portion cooperate with posts extending outwardly from the arcuate arms to buttress and support the arcuate arms. The method may further include determining whether resource capacity of the generated one or more virtual front end systems has been reached; and generating an additional one or more virtual front end systems for the customer, in response to determining that the resource capacity of the generated one or more virtual front end systems has been reached.