1212What are these connectors?

These are straight tip (ST) connectors for fiberoptic cable. They connect to a BNC-type locking mechanism. For fiber-optic connections, the subscriber connector (SC) and Lucent connector (LC) are utilized. LC connectors are about half the size of SC connectors. They both have a square housing. The SC and the LC use a small locking tab and a locking latch to hold it in place, respectively.