Edge-Core ES4016 Guide d'installation télécharger pdf (Page 40)

B-4

Cables

Cable Testing for Existing Category 5 Cable

Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk

(NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified in

the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test

parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These

tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional

Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”

Note that when testing your cable installation, be sure to include all patch cables

between switches and end devices.

Adjusting Existing Category 5 Cabling to Run 1000BASE-T

If your existing Category 5 installation does not meet one of the test parameters for

1000BASE-T, there are basically three measures that can be applied to try and

correct the problem:

1. Replace any Category 5 patch cables with high-performance Category 5e or

Category 6 cables.

2. Reduce the number of connectors used in the link.

3. Reconnect some of the connectors in the link.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 55 56

Pas de commentaire

Edge-Core ES4016 Guide d'installation Page 40