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What is the difference between a straight-through Ethernet cable, and a crossover Ethernet cable?

Patch cables can come in two different wiring applications: straight-through and crossover. The type of cable that is required depends on the application. Straight-through Ethernet cables are the most commonly used.

Cable type Typical application
Straight-through
  • Between a computer and a modem, router, or switch
  • CAT5/CAT6 peripheral extenders
  • Between other dissimilar networking equipment
Crossover
  • Between two computers
  • Between two similar networking devices

Crossover cables use two different wiring standards: one end uses the T568A wiring standard, and the other end uses the T568B wiring standard. To determine if you have a straight-through or crossover cable, compare the Ethernet cables to see if the colors are wired in the same order on each end. For more information on Ethernet wiring standards, refer to the following FAQ: http://www.startech.com/faq/network_cables_a_vs_b_pinout.

Many modern network devices support Auto MDI-X, which automatically negotiates which wiring standard is required. For example, a computer with Auto MDI-X can use either a straight-through or crossover cable for any application.

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This FAQ applies to these products:
45PATCH30RD 45PATCH7WH C6ASPAT10BL C6ASPAT10GR C6ASPAT14GR C6ASPAT1GR C6ASPAT3GR C6ASPAT7BL C6ASPAT7GR C6PAT15MGR C6PATCH3RD C6PATCH6BL C6PATCH7YL M45PATCH10BK M45PATCH15BK M45PATCH1BK M45PATCH1BL N6PATC10MBK N6PATCH100BK N6PATCH100GN N6PATCH100GR N6PATCH100OR N6PATCH100PL N6PATCH100RD N6PATCH100WH N6PATCH100YL N6PATCH10GN N6PATCH10GR N6PATCH10OR N6PATCH10PL N6PATCH10RD N6PATCH10WH N6PATCH10YL N6PATCH15GN N6PATCH15GR N6PATCH15OR N6PATCH15PL N6PATCH15RD N6PATCH15WH N6PATCH15YL N6PATCH25BK N6PATCH25GN N6PATCH25GR N6PATCH25OR N6PATCH25PL N6PATCH25WH N6PATCH25YL N6PATCH35BK N6PATCH35BL N6PATCH35GN N6PATCH35GR N6PATCH35PL N6PATCH35RD N6PATCH35WH N6PATCH35YL N6PATCH3GN N6PATCH3OR N6PATCH3PL N6PATCH3RD N6PATCH3WH N6PATCH3YL N6PATCH50GN N6PATCH50GR N6PATCH50OR N6PATCH50PL N6PATCH50RD N6PATCH50WH N6PATCH50YL N6PATCH75BK N6PATCH75BL N6PATCH75GN N6PATCH75GR N6PATCH75OR N6PATCH75PL N6PATCH75RD N6PATCH75WH N6PATCH75YL N6PATCH7GN N6PATCH7GR N6PATCH7OR N6PATCH7PL N6PATCH7RD N6PATCH7WH N6PATCH7YL RJ45PATCH1 WIR5ECMRBK WIR5ECMRWH WIR6CMRBL WIR6CMRGR WIRC5ECMR WIRC5ECMRGRY CRJ4550PK CRJ45C6SOL50 CRJ45C6STR50 C6CROSSOVER 45PAT1MBK 45PAT1MBL 45PAT1MGN 45PAT1MGR 45PAT1MOR 45PAT1MRD 45PAT1MWH 45PAT1MYL 45PAT2MBK 45PAT2MBL 45PAT2MGN 45PAT2MGR 45PAT2MOR 45PAT2MRD 45PAT2MWH 45PAT2MYL 45PAT3MBK 45PAT3MBL 45PAT3MGN 45PAT3MGR 45PAT3MOR 45PAT3MRD 45PAT3MWH 45PAT3MYL 45PAT5MBK 45PAT5MBL 45PAT5MGR N6PATC10MGN N6PATC10MOR N6PATC10MRD N6PATC10MWH N6PATC10MYL N6PATC7MOR N6PATC7MRD N6PATC7MWH N6PATC7MYL N6SPAT1MBK N6SPAT1MGR N6SPAT2MBK N6SPAT2MBL N6SPAT2MGR N6SPAT3MBK N6SPAT3MBL N6SPAT3MGR N6SPAT50CMBK N6SPAT50CMGR N6SPAT5MBK N6SPAT5MBL N6SPAT5MGR
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