Features:
- Converts one adaptive Gigabit RJ45 connection into one SC optical link.
- Uses 1550 nm transmit and 1310 nm receive wavelengths on a single fibre.
- Carries Ethernet traffic across up to 3 km of 9/125 µm single-mode fibre.
The copper and optical ports form one point-to-point media-conversion path.
Complementary WDM wavelengths are required at the far end of the same fibre strand.
Link indicators help separate a copper-side negotiation problem from an optical-path problem.
The TP-Link TL-FC311A-3 Gigabit Single-Mode Single-Fiber Media Converter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
TP-Link TL-FC311A-3 Gigabit Single-Mode Single-Fiber Media Converter Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Matching the two ends of one single-fibre link
- Local transmit: The unit launches data at 1550 nm through the SC port.
- Local receive: The same port detects the return signal at 1310 nm.
- Remote unit: The far converter uses the complementary transmit and receive wavelengths.
- Single strand: Both traffic directions share one 9/125 µm fibre.
Relating Ethernet negotiation to media conversion
- RJ45 rate: The copper port adapts to 100 or 1000 Mbps Ethernet.
- Cable type: Category 5e or better twisted pair carries the electrical link.
- Link state: Copper Link/Act indicates negotiation and traffic at the RJ45 side.
- Traffic path: Accepted Ethernet frames are forwarded to the optical interface.
Keeping the three-kilometre path inside its limits
- Transmit level: Optical output stays within the documented launch-power range.
- Receiver limit: End-to-end loss must leave sufficient power above -22 dBm sensitivity.
- Connector loss: Dirty or poorly seated SC interfaces reduce the available margin.
- Fibre identity: The route uses 9/125 µm single-mode fibre rather than multimode cable.
Separating power, copper and fibre causes
- Power LED: Confirm the DC supply before investigating either data port.
- RJ45 LED: Prove local Ethernet negotiation independently of the fibre path.
- SC LED: Check the optical link, wavelength pairing and remote converter.
- Loop isolation: Replace or test one cable segment at a time to locate the loss.