... 40/60km Dual single-mode fibers, single wavelength 1310 or 1550nm or CWDM wavelength, SC connector, operating distance 20/40/60km ... Dual multi-mode fibers, single wavelength 1310nm, SC connector ... distance 275m Dual single-mode fiber, single wavelength 1310nm or 1550nm or CWDM wavelength, dual SC or LC, operating distance 20 ...