The present invention is a non-removable closure. First and second resistors are connected in series between the reference terminal and an input terminal of a first amplifying device. The linkage mechanism, in addition to providing precise displacement of the occlusion bed, may also provide an over-center feature that enhances safety and pump operation when the door is in a closed position. One type of automated resource resource is an audiotext address generator, which automatically recognizes whether human speech over the public switched telephone network matches textual information such as a user’s name and address.