ST connectors have a key which prevents rotation of the ceramic ferrule, and a bayonet lock similar to a BNC shell. The ST is one of the older generations of connector, but is still widely used for multimode networks, especially LANS.

Specifications:
Insertion Loss: ≤30dB for SM & MM
Return Loss: ≥50dB for SM
≥30dB for MM
Durability: ≤0.2 dB typical change, 1000 matings

Features:
* Standards of IEC, Bell core
* High Reliability and Stability
* High Return Loss and Low Insertion Loss
* Bayonet style housing for easy termination

Applications:
* Local Area Networks (LANS)
* Data Processing Networks
* Premise Installations
* Instrumentation