No Lock On Stagebox with Dual SC Optical Connectors
Written by Jose Liberio Cruz
Updated at January 15th, 2026
Question:
Not Getting Stagebox to Lock Using Dual SC Optical Connectors.
Answer:
Remember that we must connect TX to RX between stagebox and mixer. Dual SC connectors are configured as straight through.
A Dual SC connector has the same fiber for A and same fiber for B. So essentially that puts TX to TX and RX to RX between the mixer and stagebox.

You must open the cover on one end and reverse the position of the 2 fibers, so A goes to B on the other end and B goes to A. On one end, snap cover off. Reverse the position of A and B, then snap cover back on.
