Cat 6 Connector Compatibility
Last Updated: 2/8/04
Q. Can a Cat 6 modular plug be plugged into Cat 5 and 5e RJ-45 Jacks?
A. Yes. The physical dimensions of Cat 6 RJ-45 plugs and jacks are identical to Cat 5 and 5e plugs and jacks. They are backward compatible with Cat 3, Cat 5, and Cat 5e plugs and jacks.