HP NC7131 PCI Gigabit Server Adapter - Manual (Page 20)

C-2 Compaq NC7131 Gigabit Server Adapter Reference Guide
UTP Cable Specifications
To connect to the network, the NC7131 adapter uses the following cable for 1000Base-T
transmission.
„ Category 5 or better UTP twisted-pair
„ 22-26 AWG, 100
Ω
@ 1 MHz
„ EIA/TIA 568a or EIA/TIA 568b
Using UTP Category 5 Cable in Gigabit Over Copper Installations
For Gigabit over copper installations, UTP Category 5 or better 1000Base-T cable must comply
with the IEEE 802.3ab 1000Base-T standard. For new installations, Category 5e (enhanced
Category 5) or better cable is recommended.
Gigabit Over Copper Cable Maximum Distances
Gigabit UTP 1000Base-T = 100 (328 feet) meters maximum
Troubleshooting Gigabit Over Copper Cabling
In a small number of cases, Category 5 cabling does not meet the performance parameters
specified by 1000Base-T. The most likely cause of the problem is in the connectors or patch
cable rather than in the horizontal cable itself. The following changes should help eliminate
these problems:
„ Replace the patch cord with a cord constructed from a Category 5e patch cable, which is
designed to comply with the return loss and ELFEXT parameters.
„ Reduce the number of connectors used in the link.
„ Reconfigure the cross-connect as an interconnect.
„ Reconnect some connectors in the link
.
„ Replace the transition point or consolidation point connector with a Category 5e transition
point or consolidation point connector.
„ Replace the work area outlet connector with a Category 5e work area outlet connector.
„ Replace the interconnect with a Category 5e interconnect.
If the cabling still does not meet the standards, you may need to install Category 5e cable.