Call alloting system for telephone exchange - limits forward moves of calls which are held in cyclic waiting registers

摘要

The call allotting and stacking system, for a telephone exchange, allots calls by considering priority and waiting time. Incoming calls are assigned a priority and are held in call and waiting registers in the order in which they arrive. They are read out of the registers in the same order as they were written in. The object of the invention is to limit the number of 'forward moves' in the cyclic waiting register and not to initiate such a forward move for all complete calls but only for some. This is achieved by making the forward move of a call waiting in the call register conditionally dependent on a new incoming call's finding no room in the call registers.