Table 31: Operating distance range over each fiber type:
Parameter Minimum Typical Maximum
62.5/125 mm MMF 2 m 2000 m
50/125 mm MMF 2 m 2000 m
Dual-speed 100FX/1000LX SFP Specifications lists the specifications for the dual-speed 100FX/1000LX
SFP module for Gigabit Ethernet (GE) ports. Operating at 100 Mbps, the dual-speed SFP conforms to
the 100BASE-LX10 standard. Operating at 1000 Mbps, the dual-speed SFP conforms to the 1000BASE-
LX standard.
Dual-speed 100FX/1000LX SFP Specifications
Table 32: Dual-speed 100FX/1000LX SFP Specifications
Parameter 100FX 1000LX
Average launch power range with 9 um SMF -8 dBm to -15 dBm -3 dBm to -11 dBm
Receiver power range with 9 um SMF -8 dBm to -25 dBm -3 dBm to -19 dBm
Optical link budget with 9 um SMF 10 dB 8 dB
Center wavelength range 1270 to 1355 1270 to 1355
Operating distance range over each optical fiber type (see note below table):
62.5/125 µm MMF 2 to 2000 m 2 to 550 m
50/125 µm MMF 2 to 2000 m 2 to 550 m
9/125 µm SMF 2 to 10,000 m 2 to 10,000 m
Note
The 100FX/1000LX SFP module complies with the 100FX-SMF standard. To use the 100FX/
1000LX SFP module in 100FX-MMF operation, a minimum attenuation of 6 dB is required.
After the SFP module is installed, connect a 6-dB attenuator to the transmitter side (Tx) of
the SFP module. Next, connect the attenuator to the single-mode end of a mode conditioning
patch cord. The mode conditioning patch cord transitions the SFP module from SMF to MMF
operation.
100BASE-LX10 SFP Specifications lists specifications for the LX100 SFP module.
Technical Specifications
Pluggable Hardware Installation Guide 59