The American Fibertek 89A-AX and 89A-AX-SL Series are designed to interface with the Aiphone AXW-AVT/R video / intercom system. The 89A-AX Series transmits one channel of high-quality, 10 bit digitized video along with one channel of bi-directional audio, and two channels of bi-directional contact closure on one multimode optical fiber. The 89AAX- SL Series transmits one channel of high-quality, 10 bit digitized video along with one channel of bi-directional audio, and two channels of bidirectional contact closure on one singlemode optical fiber. Designed to be completely transparent to all camera and monitor manufacturers, the system requires no field adjustments at installation or additional maintenance thereafter. Diagnostic indicators provide a quick visual indication of system status. The \"Afinety\" remote monitoring system is available on this product, please consult factory.