For the optical interface SatService provides E2000/APC connectors from Diamond or Huber & Suhner by default. But we are also in a position to deliver on request FC/APC or other single mode connectors. The optical interface is located at the front panel of the 19" chassis because the optical patch panels are most likely also at the front of a 19" rack. The connectors are slightly shifted backwards from the normal front plane of the 19" drawer, so they neither interfere at the front of the rack nor they can be destroyed or snapped off.