A method of forming an ATM cell having a fixed length from CPS packets according to the AAL2 protocol includes the steps of placing a header at a beginning of the ATM cell and then packing the ATM cell with the payload of the CPS packets. In particular, the OCT system of the present disclosure may provide a more intuitive interface, more efficient usage of controls, and a greater ability to view OCT imaging data. The chipset interface monitors a rotational speed of the cooling fan, and monitors a vital temperature of the computer system. The bracket body has a bicycle mounting portion and a control lever mounting portion.