Hi, whats ever is the topology you are using please remember that Branch SRX support switching only on same module . If module changes then switching is not support inter module . It is always best practice to use reth on interfaces from same module , If you still want to use optical fiber instead of fiber then search for media converter (Fiber to Copper) and use built in interfaces instead of 1-GE Mini-PIM
A kudos is good way of appreciation
Please mark this as accepted solution if it works