Media converter 10/100/1000Mbps, SingleMode, 1310nm, SC Duplex


Fibrain FMU-ASA12G-31S-0x0-E converter is an ideal choice for Ethernet users who want to extend the maximum data transmission length. Converter can work with single mode fiber optic cables. Electrical port support transmission speed of 10/100/1000 Mb/s with autonegotiation and can determine cable type. Converter can be installed in Fast Ethernet and Gigabit Ethernet networks, works in store-and-forward mode and passes VLAN tagged frames and JumboFrames up to 9kB. Using high quality optical transceivers allows to set up a link with maximum length of 80km.

External power supply assures reliability and makes maintenance easier. Converter can operate in 2U 19″ rack chassis for 16 devices with redundant power supply.


  • Transmission distance: up to 20/30/50/80km **
  • 10/100/1000Base-T to 1000Base-LX/ZX/ZR signal conversion
  • Passive cooling
  • Singlemode optical transceiver (1310nm or 1550nm - depends on distance)
  • MAC address auto-learning and auto-updating
  • High quality components
  • Supporting FDX flow control or HDX back pressure
  • Store-and-forward architecture
  • Supporting frames up to 9k bytes long
  • Supporting Auto-negotiation for RJ45 interface
  • Information about device work/state on LED diodes: port activity, power, transmission speed, RJ45 link, optical link
  • VLAN tagged frames pass-through
  • MTBF exceeding 500,000 hours

Technical parameters

Dane techniczne

Transmission speed10/100/1000Mbps
Standards IEEE802.3 10Base-T Ethernet
IEEE802.3u 100Base-TX Fast Ethernet
IEEE802.3ab 1000Base-T Gigabit Ethernet
IEEE802.3z 1000Base-LX Gigabit Ethernet
IEEE802.3x Flow control
CertificatesCE, RoHS
Transmission reachOptical port: 10/20/30/80km (depending on version)
RJ45 port: CAT5: 100m
Optical parametersFMU-ASA12G-31S-010-E
TX power: -9.5 dBm ~ -3 dBm
RX sensitivity: -21 dBm
RX overload: -3 dBm

Optical parametersFMU-ASA12G-31S-020-E
TX power: -6 dBm ~ -1 dBm
RX sensitivity: -21 dBm
RX overload: -3 dBm

Optical parametersFMU-ASA12G-31S-030-E
TX power: -3 dBm ~ 2 dBm
RX sensitivity: -23 dBm
RX overload: -3 dBm

Optical parameters FMU-ASA12G-31S-050-E
TX power: -1 dBm ~ 3 dBm
RX sensitivity: -24 dBm
RX overload: -3 dBm

Optical parameters FMU-ASA12G-31S-080-E
TX power: 0 dBm ~ 5 dBm
RX sensitivity: -24 dBm
RX overload: -3 dBm

PortsCopper: RJ45
Fiber: SC Duplex
Conversion method store-and-forward
Latency <10us
LED display PWR, FXL, TXL, 100M, 1000M, FDX
Power supply5V/1A DC (external, included in package)
Power consumption<5W
Working conditionsTemperature: 0 ~ 50 ℃
Humidity: 5%~90% non-condensing
Storage conditionsTemperature: -40~85 C
Humidity: 5~95% non-condensing
Weigth 0.15kg netto; 0.40kg brutto
Dimensions 28mm (wysokość) x 92mm (szerokość) x 117mm (głębokość)