Multimode fiber 62.5/125 μm or 50/125 μm (core/
cladding) diameter, low metal
content, graded index fiber-optic
cables, complying with the ITU-T G.
651 and ISO/IEC 793-2 Type A1b or
A1a standards respectively.
1
Single mode fiber 9/125 μm (core/cladding) diameter,
low metal content fiber-optic cables,
complying with the ITU-T G.652 and
ISO/IEC 793-2 Type B1 standards.
1
A mode conditioning patch cord may be needed for some Gigabit-LX and 10-Gigabit LRM installations.
Note on 1000BASE-T cable requirements
The Category 5 networking cables that work for 100BASE-TX connections also work for 1000BASE-T, as long as
all four-pairs are connected. But, for the most robust connections, use cabling that complies with the Category 5e
specifications. This specification is described in Addendum 5 to the TIA-568-A standard (ANSI/TIA/EIA-568-A-5).
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.
Note on HPE Smart Rate 2.5 Gb/s cable requirements
The 2.5 Gb/s Smart Rate operates on cable installations that are designed to support 1000BASE-T operation.
The cabling installation must meet the 1000BASE-T link segment characteristics described in IEEE 802.3-2012.
The installation must also meet the Category 5e or Class D limits described in the ANSI/TIA/EIA 568-C.2 and
ISO/IEC 11801 standards, respectively.
Note on HPE Smart Rate 5Gb/s cable requirements
The 5 Gb/s Smart Rate operates on most Category 5e and Category 6 cable installations. Category 5e or Class D
installations must meet the ANSI/TIA/EIA 568-C.2 or ISO/IEC 11801 transmission parameter limits extended to
200MHz. Category 6 or Class E installations must meet their respective transmission parameter limits as
described in ANSI/TIA/EIA 568-C.2 or ISO/IEC 11801.
Also, to transmission performance, 5 Gb/s Smart Rate can be sensitive to alien noise. Such noise can come from
either nearby cables or background noise from the environment. Therefore, cabling must additionally be tested for
Alien Near-End Crosstalk (ANEXT) and Alien Equal-Level-Far-End Crosstalk (AELFEXT). Depending on the
cabling installation, the magnitude of alien crosstalk may further limit the maximum supported cabling distance.
Hewlett Packard Enterprise recommends doing cable dressing carefully and in compliance with recommendations
in the TIA TSB-155-A and ISO/IEC TR-24750.
Note on 10GBASE-T cable requirements
The Category 6 networking cables that work for 1000BASE-T connections may work for 10GBASE-T. The
distance must be less than 55m, and the cable installation must be tested for compliance to IEEE requirements.
But, for the most robust connections, use cabling that complies with the Category 6A or Category 7 specifications,
as described in the TIA-568-C (ANSI/TIA-568-C.2) and ISO/IEC 11801 standards. 10GBASE-T is a sophisticated
technology that relies upon high-quality cable installations. It is sensitive to Alien Near End Crosstalk (ANEXT).
This can affect the cable due to other cables placed close to the data cables. Hewlett Packard Enterprise
recommends doing cable dressing carefully and in compliance with recommendations in the TIA TSB-155A.
Chapter 8 Cabling and technology information 89
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