Continuing my posts on fiber cable connectors in the data center, today I’m going to cover the ST Connector.
The ST Connector

ST stands for Straight Tip. It has a 2.5mm ferrule in a simplex format. It was developed by AT&T shortly after the FC was developed by NTT. Essentially it was AT&T’s answer to this new smaller form factor connector. The design is very similar but the ST has a quick locking mechanism that significantly speeds up installation time. The locking mechanism has a key which does not allow the ferrule to rotate when installed. This is very similar to a BNC connector that you may be familiar with.


