Abstract: A parking access control system and a method of its operation in association with a parking facility. A customer operates a call box to initiate a communications session with an attendant control device operated by an attendant. In particular, the customer requests the attendant to control an exit gate so as to enable the customer to exit the parking facility with a vehicle. In response, the attendant may input into the attendant control device one of several available predetermined override conditions, which will be logged as an override transaction entry in a database in memory. After the override condition is entered, then the exit gate will operate so as to enable the customer to exit the parking facility. The override transaction entry further may also include an identification of the attendant.

Abstract: An electronic digital thermostat is disclosed which is capable of use in a pneumatically controlled temperature control system of the type which has a pneumatic supply line which extends to various components of the control system and wherein the control elements of the system are controlled by varying the control pressure that is communicated to such elements. The thermostat is capable of operating in a LAN system environment, and can be retrofitted into unit ventilators and the like as a substitute for a conventional pneumatic thermostat. The thermostat has a processing means that enables sophisticated control to be achieved.