When you need a simple solution to join two single mode opticalCON DUO cables together, the Camplex HF-OC2S2S offers an easy fix. It extends your opticalCON DUO run in a field tough, black powder coated housing. The Camplex HF-OC2S2S includes 4 copper conductors to mate DUO SMPTE cables but it may also be used with standard DUO (non-SMPTE) type cables. As is standard with the DUO system, the coupler features flip up dust covers and an automatic shutter on each mating connector.