I sought an extension cord to the antenna wifi FOSCAM a surveillance camera (which was too far from the Freebox) Before I bought another model, longer, and (possibly) lower quality. The connection was random. With this (shorter): no problem. For both models, I had to buy adapters "RP-SMA-Plug to SMA-Female" and "SMA-Male to RP-SMA-Jack" to connect the extension cable to the camera.