also include a communications interface communications interface allows software and data to be transferred between computer system and external devices examples of communications interface may include a modem a network interface such as an ethernet card a communications port a personal computer memory card international association pcmcia slot and card etc software and data transferred via communications interface are in the form of signals which may be electronic electromagnetic optical or other signals capable of being received by communications interface these signals are provided to communications interface via a communications path e g channel this channel carries signals and may be implemented using wire cable fiber optics a telephone line a cellular link a radio frequency rf link wireless and other communications channels computer programs also referred to as computer control logic are stored in main memory and or secondary memory computer programs may also be received via communications interface such computer programs when executed enable the computer system to perform the features as discussed herein in particular the computer programs when executed enable the processor to perform the features of various embodiments accordingly such computer programs represent controllers of the computer system in various embodiments software may be stored in a computer program product and loaded into computer system using removable storage drive hard disk drive or communications interface the control logic software when executed by the processor causes the processor to perform the functions of various embodiments as described herein in various embodiments hardware components such as application specific integrated circuits asics implementation of the hardware state machine so as to perform the functions described herein will be apparent to persons skilled in the relevant.