ST series connector
 
    ST connector, designed and developed by AT&T, is a bayonet mechanical Connector. It uses a ferrule with O.D. measuring 2.5mm. End-face of ferrule is available in Flat, PC and APC. it is easy to be coupled, with low insertion loss. ST series completely meets the standard of FOCIS 2, EIA/TIA-604-02 and the standard of telecom industry.