APC step vs. conical end faces

You may not be aware, but there are two types of end faces possible for Angled Physical Connectors (APC).


  • Step ferrules are much more common that conical ferrules (nearly 5:1 ratio in the field)
  • Step ferrules are considered an improvement over conical ferrules in both cost and ease of manufacture.
  • They are easier to polish than conical – they can hold tighter geometry specs and take less time to process.
  • There is no performance advantage – if built to spec.

Fluke Networks APC test reference cords and launch fibers use a step end face.