1. A method for estimating call load using a load simulation of a voice recognition unit, the method comprising: determining, by a processor communicably coupled to the voice recognition unit: a number of maximum simultaneous channels for the load simulation; a duration of a call of expected simultaneous calls for the load simulation; at least one of a drift and latency for the call; an active call handling procedure for the load simulation; a load to timing choice for the load simulation; a number of the expected simultaneous calls; a minimum percentage of time that the expected simultaneous calls will be sustained; a type of the call load; a timing to load choice for the load simulation; a number of the expected simultaneous calls to be placed in a batch of the expected simultaneous calls; an inter-call duration between the expected simultaneous calls in the batch; and a batch call duration.