HP J4899B User Manual - Page 59
B. Switch Ports and Network Cables, Switch Ports, Twisted-Pair Cables
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B Switch Ports and Network Cables Switch Ports and Network Cables Note This appendix includes switch connector information and network cable information for cables that should be used with the Switch 2650, including minimum pin-out information and specifications for twisted-pair cables. Incorrectly wired cabling is the most common cause of problems for LAN communications. HP recommends that you work with a qualified LAN cable installer for assistance with your cabling requirements. Switch Ports The fixed RJ-45 10/100Base-TX and 10/100/1000Base-T ports on the switch accept 100-ohm unshielded and shielded twisted-pair cable with RJ-45 connectors as described on the next page. Twisted-Pair Cables 10 Mbps Operation Category 3, 4, or 5 100-ohm unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable, complying with IEEE 802.3 Type 10Base-T specifications, fitted with RJ-45 connectors 100 Mbps Operation Category 5 100-ohm UTP or STP cable, complying with IEEE 802.3u 100Base-TX specifications, fitted with RJ-45 connectors 1000 Mbps Operation Category 5 100-ohm 4-pair UTP or STP cable, complying with IEEE 802.3ab 1000Base-T specifications, fitted with RJ-45 connectors-Category 5E or better is recommended (please see "Note on 1000Base-T Cable Requirements", below) Note on 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). B-1