Media converter 10/100Mbps, SingleMode, 1310nm, SC Duplex, 10,20,40,60,80,100,120km


Fibrain FMU-ASR01M-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 Mb/s with autonegotiation and can determine cable type. Converter can work in two modes – store-and-forward or straight-through. Implemented mechanisms allow to transmit frames with VLAN tag. BiDi transceivers allows to create bi-directional transmission in one optical fiber. External power supply assures reliability and makes maintenance easier. Converter can operate in 2U 19″ rack chassis for 16 devices with redundant power supply.


  • Signal conversion 10/100Base-TX to 100Base-FX SM
  • Transmission reach up to 120km (depending on version)
  • Singlemode transceiver (1310nm or 1550nm)
  • Passive cooling
  • High quality transceivers assure transmission quality on highest level
  • MAC addresses auto learning and auto update, store-and-forward or straight-through mode
  • Transmission FDX flow control or HDX back pressure
  • Speed autonegotiation for RJ45 port
  • Link State Forward feature
  • Frame length up to 1600 bytes
  • Information about device work/state on LED diodes: port activity, power, transmission speed, RJ45 link, optical link
  • MTBF exceeding 500,000 hours

Technical parameters

Technical details

Transmission speed10/100Mbps
Standards IEEE802.3 10Base-T Ethernet,
IEEE802.3u 100Base-TX Fast Ethernet,
IEEE802.3u 100Base-FX Fast Ethernet,
IEEE802.3x Flow control
Wavelengths1310nm (1550nm for 100km and 120km)
CertificatesCE, RoHS
Transmission reachOptical port: 25/40/60/80/100/120km (depending on version)
RJ45 port: CAT5: 100m
Optical parametersFMU-ASR01M-31S-025-E
TX power:-14 dBm ~ -3 dBm
RX sensitivity: -32 dBm
RX overload: -3dBm

TX power:-8 dBm ~ -3 dBm
RX sensitivity: -34 dBm
RX overload: -3dBm

TX power:-5 dBm ~ 0 dBm
RX sensitivity: -36 dBm
RX overload: -3dBm

TX power:-2 dBm ~ 3 dBm
RX sensitivity: -36 dBm
RX overload: -3dBm

TX power: 0 dBm ~ 4 dBm
RX sensitivity: -36 dBm
RX overload: -3dBm

TX power: 0 dBm ~ 5 dBm
RX sensitivity: -36 dBm
RX overload: -3dBm
PortsCopper: RJ45
Fiber: SC Duplex
Conversion methodstore-and-forward, straight-through
Latency<10us store-and-forward, <1us straight-through
LED displayPWR, FPL, TPL, TRX, FRX, 10/100M
Power supply 5V/1A DC (external, included in package)
Power consumption<5W
Work conditions Temperature: 0~50 C
Humidity: 5~95% non-condensing
Storage conditions Temperature: -40~85 C
Humidity: 5~95% non-condensing
Material Aluminum
Weigth 0.15kg netto; 0.40kg brutto
Dimensions28mm x 92mm x 117mm (height x width x depth)