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B-2
Switch Ports and Network Cables
Switch Ports and Network
Cables
Because of the increased speed provided by 1000Base-T (Gigabit-T), network
cable quality is more important than for either 10Base-T or 100Base-TX.
Cabling plants being used to carry 1000Base-T networking must comply with
the IEEE 802.3ab standards. In particular, the cabling must pass tests for
Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT).
Additionally, unlike the cables for 100Base-TX, the 1000Base-T cables must
pass tests for Equal-Level Far-End Crosstalk (ELFEXT) and Return Loss.
When testing your cabling, be sure to include the patch cables that connect
the switch and other end devices to the patch panels on your site. The patch
cables are frequently overlooked when testing cable and they must also
comply with the cabling standards.
Fiber-Optic
1000Base-SX 62.5/125 μm or 50/125 μm (core/cladding) diameter, graded-
index, multimode fiber-optic cables, complying with the
ITU-T G.651 and ISO/IEC 793-2 Type A1b or A1a respec-
tively, fitted with LC connectors.
1000Base-LX single mode fiber-optic cables, complying with the ITU-T
G.652 and ISO/IEC 793-2 Type B1 standards, fitted with LC
connectors
OR
62.5/125 μm or 50/125 μm (core/cladding) diameter, graded-
index, multimode fiber-optic cables, complying with the
ITU-T G.651 and ISO/IEC 793-2 Type A1b or A1a respec-
tively, fitted with LC connectors
Note: Multimode fiber-optic cabling may be used for a
1000Base-LX application, but a mode conditioning patch
cord may be needed. See “Mode Conditioning Patch Cord
for Gigabit-LX” on page B-3 for more information.
1000Base-LH single mode fiber-optic cables, complying with the ITU-T
G.652 and ISO/IEC 793-2 Type B1 standards, fitted with LC
connectors
10-GbE SR Multimode fiber-optic cable designed for Gigabit Ethernet: 62.5/
125 μm (core/cladding) diameter or 50/125 μm, 850 nm, low metal
content, complying with the ITU-T G.652 and ISO/IEC 793-2 Type
B1 standards.
10-GbE LR 9/125 μm (core/cladding) diameter, 1310 nm, low metal content,
single mode fiber-optic cables, complying with the ITU-T G.652
and ISO/IEC 793-2 Type B1 standards.
10-GbE ER 9/125 μm (core/cladding) diameter, 1550 nm, low metal content,
single mode fiber-optic cables, complying with the ITU-T G.652
and ISO/IEC 793-2 Type B1 standards.
Note: Conditioning patch cord cables are not supported on 10-GbE speeds.