Rehoming Strategies from an Existing Electromechanical to a Relief Electronic Switching System

When a relief toll switching system is used to alleviate the exhaust problem of an existing toll switching system of the same generic, type, a rehoming program (specifying amounts and timings of trunk rearrangements) is dictated primarily by the ratio of the monetary discount rate to the traffic growth rate. If this ratio is greater than unity, the rehoming strategy calls for a conservative program of restraint whereas if this ratio is smaller than unity, the rehoming strategy adopts an aggressive program of activity. When the relief and the existing switching systems are not of the same type, the lower trunk maintenance expenses on the relief switching system provide an impetus to rehome more existing trunks onto the relief switching system. It is found that this stimulation of early deloading affects the rehoming strategies significantly. Depending on the amount of stimulation involved, a conservative rehoming program could be changed to a moderate and even an aggressive one.