Cabling and Technology Information
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1000BASE-T cable requirements
The Category 5 networking cables that work for 100BASE-TX connections should also work for
1000BASE-T, as long as all four-pairs are connected. But, for the most robust connections, you should
use cabling that complies with the Category 5e specifications, as 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.
Like 1000BASE-T, 10GBASE-T requires testing of all the crosstalk and return loss parameters
described above, and also ANEXT. In addition to ANEXT, 10GBASE-T is more sensitive to external
electrical noise in the environment. It is recommended that radio transmitters and other sources of
high frequency continuous wave radio frequency be kept away from LAN cables.
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. For 10GBASE-T, Category 6 patch cables
are sensitive to movement once link has been established, and could cause link to drop if moved.
Therefore, Aruba recommends using Category 6A patch cables, or using cable management options
to tie down (dress) the Category 6 patch cables so they cannot move.
For Conducted and Radiated Immunity in accordance with EN55024, the Aruba switch is limited to
Performance Criteria A with shielded cables (CAT6A).
10GBASE-T cable requirements
The Category 6 networking cables that work for 1000BASE-T connections may work for 10GBASE-T, as
long as the distance is less than 55m and the cable installation has been tested for compliance to IEEE
requirements. But, for the most robust connections, you should 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) which can be generated on the cable
due to cables placed in close proximity to the data cables. It is recommended that cable dressing be
done carefully and in compliance with recommendations in the TIA TSB- 155A.
Technology Distance Specifications
Technology
Supported cable
type
Multimode fibermodal
bandwidth
Supported distances
1000BASE-T
Twisted-pair copper
N/A
up to 100 meters
1000BASE-SX
Multimode fiber
160 MHz*km
200 MHz*km
2 - 220 meters
2 - 275 meters
Summary of Contents for aruba 9300-32D Series
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