Brocade Communications Systems 53-1002580-01 Manual Do Utilizador
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Brocade 6910 Ethernet Access Switch Hardware Installation Guide
53-1002580-01
Twisted-Pair Cable and Pin Assignments
B
Note that when testing your cable installation, be sure to include all patch cables between switches
and end devices.
and end devices.
Adjusting Existing Category 5 Cabling to Run 1000BASE-T
If your existing Category 5 installation does not meet one of the test parameters for 1000BASE-T,
there are basically three measures that can be applied to try and correct the problem:
there are basically three measures that can be applied to try and correct the problem:
1. Replace any Category 5 patch cables with high-performance Category 5e or Category 6 cables.
2. Reduce the number of connectors used in the link.
3. Reconnect some of the connectors in the link.
Fiber Standards
The International Telecommunication Union (ITU-T) has standardized various fiber types for data
networks. These are summarized in the following table.
networks. These are summarized in the following table.
TABLE 8
FIBER STANDARDS
ITU-T Standard
Description
Application
G.651
Multimode Fiber
50/125-micron core
50/125-micron core
Short-reach connections in the 1300-nm or
850-nm band.
850-nm band.
G.652
Non-Dispersion-Shifted
FiberSingle-mode, 9/125-micron core
FiberSingle-mode, 9/125-micron core
Longer spans and extended reach.
Optimized for operation in the 1310-nm
band. but can also be used in the 1550-nm
band.
Optimized for operation in the 1310-nm
band. but can also be used in the 1550-nm
band.
G.652.C
Low Water Peak
Non-Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
Non-Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
Longer spans and extended reach.
Optimized for wavelength-division
multiplexing (WDM) transmission across
wavelengths from 1285 to 1625 nm. The
zero dispersion wavelength is in the
1310-nm region.
Optimized for wavelength-division
multiplexing (WDM) transmission across
wavelengths from 1285 to 1625 nm. The
zero dispersion wavelength is in the
1310-nm region.
G.653
Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
Single-mode, 9/125-micron core
Longer spans and extended reach.
Optimized for operation in the region
from 1500 to 1600-nm.
Optimized for operation in the region
from 1500 to 1600-nm.
G..654
1550-nm Loss-Minimized
FiberSingle-mode, 9/125-micron core
FiberSingle-mode, 9/125-micron core
Extended long-haul applications.
Optimized for high-power transmission in
the 1500 to 1600-nm region, with low loss
in the 1550-nm band.
Optimized for high-power transmission in
the 1500 to 1600-nm region, with low loss
in the 1550-nm band.
G.655
Non-Zero Dispersion-Shifted
FiberSingle-mode, 9/125-micron core
FiberSingle-mode, 9/125-micron core
Extended long-haul applications.
Optimized for high-power dense
wavelength-division multiplexing (DWDM)
operation in the region from 1500 to
1600-nm.
Optimized for high-power dense
wavelength-division multiplexing (DWDM)
operation in the region from 1500 to
1600-nm.