The current channel is set by the calling program or transaction by issuing a LINK, XCTL, START and pseudo-conversational RETURN with the channel parameter.
Always there is a special case, of course, is formed when a websites longer to a set of complete collection system, no matter how many pseudo static parameter is no longer is a must.
The design of controller is based directly on pseudo- partial-derivatives (PPD) derived on-line from the input and output information of the system using a novel parameter estimation algorithm.