I would like to know how I get the status of a checkbox whether it is enabled or not to pass by parameter to the controller
If the idea is to check if check is checked, the query should be done as below:
var checkado = $("#chkAguardandoEnvio").prop("checked");
If you know whether check is enabled for dialup, use this one:
var habilitado = $("#chkAguardandoEnvio").attr("disabled") != undefined;