Nortel Networks 312865-A manual Connecting to Nortel Networks online

Table 6 1000BASE-ZX GBIC specifications (continued)

Type	Specifications
Distance	70 km
Receiver Characteristics
Wavelength	1200 to 1550 nm
Minimum receiver sensitivity	-22 dBm
Maximum input power	-3 dBm

Note: When shorter lengths of single-mode fiber cable are used, there is a risk of overloading the receiver. It may be necessary to insert an in-line optical attenuator in the link to prevent overloading, as follows:

•Insert a 10 dB in-line optical attenuator between the fiber optic cable plant and the receiving port on the 1000BASE-ZX GBIC, at each end of the link, if the fiber optic cable span is less than 25 km.

•Insert a 5 dB in line optical attenuator between the fiber optic cable plant and the receiving port on the 1000BASE-ZX GBIC, at each end of the link, if the fiber optic cable span is less than 50 km.

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