Gigabit Ethernet Switch – Hardware Manual
Page 31 of 36
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©2016_MICROSENS GmbH & Co. KG_Küferstr. 16_59067 Hamm/Germany_www.microsens.com
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 to
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.
Fiber Standards
ITU-T
Standard
Description
Application
G.651
Multimode Fiber
50/125-micron core
Short-reach connections in
the 1300- nm or 850-nm
band
G.652
Non-Dispersion-Shifted
Fiber
Single-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
G.652.C
Low Water Peak 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.
G.653
Dispersion-Shifted Fiber
Single-mode, 9/125-micron
core
Longer spans and extended
reach. Optimized for
operation in the region
from 1500 to 1600-nm.
G.654
1550-nm Loss-Minimized
Fiber
Single-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.
G.655
Non-Zero Dispersion-
Shifted
Fiber
Single-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.
