Doorbird POE Gigabit Injector A1091 for Doobird Intercom Systems for All DoorbirdWorks with all Doorbird systems The DoorBird A1091 PoE Injector is a compact and robust Gigabit PoE injector, compatible with the PoE IEEE 802. 3af standard. Its high quality metal enclosure has been designed for mounting on walls, ceilings or in control cabinets. The PoE Injector can be used wherever PoE compatible network devices are supplied with power via network cable. The PoE injector is supported by all PoE compatible DoorBird network devices,