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A
E
DJUSTING
XISTING
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:
Replace any Category 5 patch cables with high-performance Category 5e or
1.
Category 6 cables.
Reduce the number of connectors used in the link.
2.
Reconnect some of the connectors in the link.
3.
F
S
IBER
TANDARDS
The International Telecommunication Union (ITU-T) has standardized various
fiber types for data networks. These are summarized in the following table.
Table 16: Fiber Standards
ITU-T
Description
Standard
G.651
Multimode Fiber
50/125-micron core
G.652
Non-Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
G.652.C
Low Water Peak Non-
Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
G.653
Dispersion-Shifted Fiber
Single-mode, 9/125-micron core
C
5 C
ATEGORY
ABLING TO
– 69 –
A
PPENDIX
R
1000BASE-T
UN
Application
Short-reach connections in the 1300-
nm or 850-nm band
Longer spans and extended reach.
Optimized for operation in the 1310-
nm band. but can also be used in the
1550-nm band
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.
Longer spans and extended reach.
Optimized for operation in the region
from 1500 to 1600-nm.
| Cables
B
Fiber Standards
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