Safe checkout
Secure payments
Fast dispatch
1–2 day handling
Free shipping
U.S. ground
Warranty & RMA
Support after delivery
Transition SISTF1011-140-LR 100BFX Switch ST 100BFX Media Converter
- 100Base-FX Fiber to 100Base-TX Copper Media Converter
- Supports SC fiber optic connector
- Single-mode fiber support
- Long-distance transmission capability
- Auto-negotiation on copper port
- Plug-and-play installation
- LED indicators for status monitoring
- Extends network reach beyond copper limitations
SISTF1011-140-LR isn't on our shelf today — we source it to order. Request a quote and we'll confirm price and lead time within one business day.
Key specifications
See full specs ↓- Product Type
- Media Converter
- Model
- SISTF1011-140-LR
- Fiber Type
- Single-Mode Fiber (SMF)
- Fiber Connector
- SC
- Copper Port
- 10/100Base-TX (RJ45)
- Fiber Port
- 100Base-FX
Product details
The Transition Networks SISTF1011-140-LR is a 100BFX media converter that facilitates the conversion between 100Base-FX fiber optic and 100Base-TX copper Ethernet connections. It is designed for extending network distances over fiber optic cable.
Technical Information
| Product Type | Media Converter |
| Model | SISTF1011-140-LR |
| Fiber Type | Single-Mode Fiber (SMF) |
| Fiber Connector | SC |
Additional Specifications
| Copper Port | 10/100Base-TX (RJ45) |
| Fiber Port | 100Base-FX |
| Max Distance (Fiber) | Up to 40 km (approx. 25 miles) |
| Management | Unmanaged |
Description
The Transition Networks SISTF1011-140-LR is a robust media converter designed to bridge the gap between copper Ethernet cabling and fiber optic networks. Specifically, it converts signals between 10/100Base-TX Fast Ethernet over twisted-pair copper cable and 100Base-FX Fast Ethernet over single-mode fiber optic cable. This allows network administrators to extend the reach of their Ethernet networks significantly beyond the typical 100-meter limit of copper cabling, leveraging the longer transmission distances offered by fiber optics. The '140-LR' designation typically indicates support for long-reach (LR) single-mode fiber, enabling communication over distances of up to 40 kilometers (approximately 25 miles). The converter features an SC fiber optic connector, a common and secure connection type for fiber optic networks, and an RJ45 connector for the 10/100Base-TX copper port. The copper port supports auto-negotiation, allowing it to automatically detect the optimal speed and duplex mode for connected devices. This media converter is an unmanaged device, meaning it requires no complex configuration and can be deployed quickly using a plug-and-play approach. It is ideal for connecting network segments in different buildings, spanning across campuses, or integrating legacy copper-based equipment into a fiber optic backbone. Comprehensive LED indicators on the unit provide visual feedback on link status, activity, and power, simplifying troubleshooting and network monitoring.
Condition: Refurbished
Free U.S. ground shipping
Typically 1–2 days handling, 3–7 days in transit.
Purchase orders accepted
Government, enterprise, data center and small business.
Buying 10+ units?
Get volume pricing and availability for SISTF1011-140-LR.

