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PPENDIX
Twisted-Pair Cable and Pin Assignments
Table 17: 1000BASE-T MDI and MDI-X Port Pinouts
ITU-T
Description
Standard
G.654
1550-nm Loss-Minimized
FiberSingle-mode, 9/125-
micron core
G.655
Non-Zero Dispersion-Shifted
FiberSingle-mode, 9/125-
micron core
Application
Extended long-haul applications.
Optimized for high-power
transmission in the 1500 to 1600-nm
region, with low loss in the 1550-nm
band.
Extended long-haul applications.
Optimized for high-power dense
wavelength-division multiplexing
(DWDM) operation in the region from
1500 to 1600-nm.
– 62 –
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