Fibre optic adapter duplex ST/SC InLine 89991D

The InLine Fiber Optical Adapter Duplex ST/SC 89991D is a panel-mount bush adapter for multi-mode fiber connections. It incorporates a precision metal ferrule and a grey metal sleeve with flange for secure placement in optical patch panels, distribution trays, wall boxes and similar mounting points. The adapter is supplied in beige colour and packaged in a polybag for protection during transport and storage.

Advantages

The duplex ST/SC adapter provides accurate coupling and alignment of ST and SC connectors through its internal metal ferrule, ensuring consistent multi-mode performance. Its flange and screw-compatible design simplifies installation into patch panels and distribution frames. The metal sleeve increases mechanical durability, while the compact bush form factor allows dense panel layouts.

Suitable for

• Multi-mode fiber patching in LAN and campus networks
• Mounting into optical patch panels and distribution trays
• Wall box and enclosure terminations
• Fiber backbone and cross-connect applications

Key specifications

• Type: Duplex ST/SC fibre optical adapter
• Brand: InLine
• MPN: 89991D
• EAN: 4043718257157
• Ferrule material: metal (precision internal ferrule)
• Sleeve colour: grey metal with flange
• Colour (housing): beige
• Packaging: polybag
• Application: multi-mode fibre

How to use

Insert the adapter into the designated cut-out or flange mounting position on the patch panel, distribution tray or wall box and secure with the provided screws or clips. Align the ST and SC connectors with the adapter ports and push until the connectors engage. For duplex links, connect matching transmitter and receiver fibers to maintain correct signal routing. Ensure connector endfaces are clean before mating to prevent attenuation or damage.

Recommendations

For reliable performance, use this InLine 89991D adapter with clean, undamaged ST and SC connectors and follow standard fibre handling procedures. Inspect and clean connector endfaces with appropriate fibre cleaning tools before each connection and avoid excessive mechanical stress on mounted adapters during installation.