You could use the zero? method. It returns true if 0. If you need to backwards, you could easily negate it to !@system_config.resend.zero?. Or you could extend the Fixnum class, adding a to_b? method, since everything is open and extensible in dynamic languages.
class Integer
def to_b?
!self.zero?
end
end

Ruby API: http://ruby-doc.org/core/classes/Fixnum.html#M001050