Cisco 1000BASE-ZX SFP (SFP-GE-Z) for single mode fiber long range

The Cisco Gigabit Interface Converter 1000BASE-ZX SFP (SFP-GE-Z) operates fiber optic links mono mode.

The Cisco Gigabit Interface Converter 1000BASE-ZX SFP (SFP-GE-Z) for single mode fiber long range links operating in single mode optical fiber to about 70 km in length.

The Cisco Gigabit Interface Converter 1000BASE-ZX SFP (SFP-GE-Z) provides a budget of 23 dB, but the precise length of the link depends on many factors such as optical fiber quality, number of connections and connectors.

When shorter distances of single mode optical fiber are used, may be necessary to insert a line optical attenuator in the link to avoid overloading the receiver.

A line optical attenuator in 10 dB can be inserted between the fiber optic cable and the receiving port in the SFP at each endpoint of the link whenever the loss of fiber optic cable is less than 8 dB.