Teletrol Systems Inc.(Manchester, NH) announced at the AHR Expo in Atlantic City that its eTRAC BACnet I/O product has successfully passed the testing process to qualify for a listing with the BTL (BACnet Testing Laboratories). The BTL, which is part of the BACnet Manufacturer's Association(tm) (BMA), offers a product testing and listing program for products that have BACnet capability. Teletrol is a BMA Member and recently hosted a two-day interoperability "plugfest" with thirteen other BMA members in Manchester, NH.