Chapter 6
| Port Connections
Fiber Cabling Guidelines
– 44 –
1000BASE-T Cable Requirements
All Category 5 UTP cables that are used for 100BASE-TX connections should also
work for 1000BASE-T, providing that all four wire pairs are connected. However, it is
recommended that for all critical connections, or any new cable installations,
Category 5e (enhanced Category 5) or Category 6 cable should be used. The
Category 5e and 6 specifications include test parameters that are only
recommendations for Category 5. Therefore, the first step in preparing existing
Category 5 cabling for running 1000BASE-T is a simple test of the cable installation
to be sure that it complies with the IEEE 802.3-2008 standards.
Fiber Cabling Guidelines
The switch includes 20 slots for 40G QSFP+ fiber-optic transceivers.
Note that all 40GBASE fiber optic ports can operate in a single-lane mode at
40 Gbps full duplex, or in a four-lane mode at 10 Gbps full duplex.
Note:
The length of fiber optic cable for a single switched link should not exceed
the relevant standards specified in this section. However, power budget constraints
should also be considered when calculating the maximum fiber optic cable length
for a particular link.
Note:
Maximum distances may vary for different QSFP+ vendors.
6 Bi-directional Pair B Minus (BI_DB-) Bi-directional Pair A Minus (BI_DA-)
7 Bi-directional Pair D Plus (BI_DD+) Bi-directional Pair C Plus (BI_DC+)
8 Bi-directional Pair D Minus (BI_DD-) Bi-directional Pair C Minus (BI_DC-)
Table 13: 1000BASE-T MDI and MDI-X Port Pinouts
Pin MDI Signal Name MDI-X Signal Name
Table 14: Maximum 40 Gigabit Fiber Cable Lengths
Fiber Size Fiber Bandwidth Maximum Cable Length Connector
10GBASE-SR4
62.5/125 micron multimode 160 MHz/km 2-26 m (7-85 ft.) LC
62.5/125 micron multimode 200 MHz/km 2-33 m (7-108 ft.) LC
50/125 micron multimode 400 MHz/km 2-66 m (7-216 ft.) LC
50/125 micron multimode 500 MHz/km 2-82 m (7-269 ft.) LC
50/125 micron multimode 2000 MHz/km 2-300 m (7-984 ft.) LC
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