SMC Networks 6224M INT - annexe 1 Installation Manual page 65

Table B-2 1000BASE-T MDI and MDI-X Port Pinouts
Pin MDI Signal Name
3 Bi-directional Data Two Plus
(BI_D2+)
4 Bi-directional Data Three Plus
(BI_D3+)
5 Bi-directional Data Three Minus
(BI_D3-)
6 Bi-directional Data Two Minus
(BI_D2-)
7 Bi-directional Data One Plus
(BI_D4+)
8 Bi-directional Data Four Minus
(BI_D4-)
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.
T -P C
WISTED AIR
P
ABLE AND IN
MDI-X Signal Name
Bi-directional Data One Plus
(BI_D1+)
Bi-directional Data Four Plus
(BI_D4+)
Bi-directional Data Four Minus
(BI_D4-)
Bi-directional Data One Minus
(BI_D1-)
Bi-directional Data One Plus
(BI_D3+)
Bi-directional Data Three Minus
(BI_D3-)
A
SSIGNMENTS
B-5