100BaseFX/BX SFP Fiber Module – 40 km



The Signamax 065-73FXSM40MG is a Small Form-factor Pluggable (SFP) multimode fiber module that supports Fast Ethernet, SONET OC-3, or SDH STM-1 over singlemode fiber cable at distances up to 40 kilometers. It adheres to the IEEE 802.3u standard for Fast Ethernet over singlemode fiber at 1310 nm, and is a cost-effective method of providing changeable Fast Ethernet / OC-3 / STM-1 singlemode interfaces to switches and media converters designed for these applications that are equipped with a standard 100Base SFP port.



  • RoHS compliant
  • Meets the SFP Multi-Source Agreement (MSA)
  • Up to 40 km link distance
  • Hot pluggable
  • Metal enclosure for low EMI performance
  • Low power dissipation



  • Metro Access Rings
  • Point-to-Point networking
  • SONET OC-3 / SDH STM-1 over singlemode fiber
  • 100BaseFX Fast Ethernet over singlemode fiber



Part Number Model /
Link Power
Typical Max.
065-73FXSM40MG LX
1310 nm
FP Laser 29 dBm 40 km 3.3V 0 ~ 70° C

** Maximum distances attainable on singlemode fiber circuits are dependent upon a circuit’s conditions; i.e., the number of splices and patch panels and the  number of bends in the circuit path. For comparison with competing products, please use the Link Power Budget for meaningful comparisons.

Download Specifications (PDF 370 Kb) Revised 09.30.2011



Part NumberDescriptionAdd to [?] 
065-73FXSM40MG100BaseFX / OC-3 / STM-1 SFP Module - SM/LC, 40 km