HP (Hewlett-Packard) 2610 Manual Do Utilizador

B-2

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.

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.

Technology distance specifications

100-FX

multimode fiber 

any

up to 2,000 meters

100-BX

single mode fiber 

N/A

0.5 - 10,000 meters

1000-T

twisted-pair copper

N/A

up to 100 meters

1000-SX

multimode fiber

160 MHz*km
200 MHz*km
400 MHz*km
500 MHz*km

2 - 220 meters
2 - 275 meters
2 - 500 meters
2 - 550 meters

1000-LX

multimode fiber

single mode fiber

400 MHz*km
500 MHz*km
N/A

2 - 550 meters
2 - 550 meters
2 - 10,000 meters

1000-LH

single mode fiber

N/A

10 - 70,000 meters

1

1000-BX

single mode fiber

N/A

0.5 - 10,000 meters

1

 For distances less than 20km, a 10dB attenuator must be used. For distances between 20km

  and 40km, a 5dB attenuator must be used. Attenuators can be purchased from most cable
  vendors.