Editing Gigabit Ethernet (section)

===1000BASE-KX===
802.3ap-2007 CL70 standardized 1000BASE-KX is part of the IEEE 802.3ap standard for Ethernet Operation over Electrical Backplanes. This standard defines one to four lanes of backplane links, one RX and one TX differential pair per lane, at link bandwidth ranging from 100&nbsp;Mbit to 10&nbsp;Gbit per second (from 100BASE-KX to 10GBASE-KX4). The 1000BASE-KX variant uses 1.25 [[Gigabaud|GBd]] electrical (not optical) signalling speed.
<!-- |-
| [[Gigabit Ethernet#1000BASE-CX|1000BASE<br />‑CX]]
| {{nowrap|802.3z-1998<br /><small>(CL39)</small>}}
| {{partial|legacy}}
| {{terminated|[[Twisted pair|TWP]]<br />shielded<br />[[balanced]]}}<br />(150&nbsp;Ω)
| {{terminated|<small>[[Modular connector#8P8C (8 position 8 contact)|8P8C]]<br />[[D-subminiature|DE-9]]<br/>[[Fibre Channel electrical interface#8-pin "HSSDC" cable connector (High Speed Serial Data Connection)|FC/HSSDC]]<br />{{nowrap|CX4 (SFF-8470)}}<br />{{nowrap|(IEC 61076-3-103)}}</small>}}
| {{N/A}}
| align="right" | 0.025
| align="right" | 4
| align="right" | 4
| <small>[[Data center|Data centres]];<br />predates 1000BASE-T; rarely used.</small>
|-
| [[Gigabit Ethernet#1000BASE-KX|1000BASE<br />‑KX]]
| {{nowrap|802.3ap-2007<br /><small>(CL70)</small>}}
| {{active|current}}
| {{terminated|Cu-[[Backplane]]}}
| {{N/A}}
| {{N/A}}
| align="right" | 0.001
| align="right" | 1
| align="right" | 4
| <small>[[Printed circuit board|PCBs]]</small> -->