Like tabs vs spaces, or Pokémon vs Digimon, the RJ45 boot is arguably a cause of controversy for many. Is it, however, in the official design specification for the RJ45 connector, or is it a non-standard addition?

The existence of so many boot designs could suggest that it is non-standard; some are just a tab, others an all-encompassing shroud. Unfortunately, I have been unable to find conclusive evidence to support or dismiss this hypothesis.

For example, was the design team behind FN - 63697 just following the official RJ45 specification?

Just to be clear, I am referring specifically to the RJ45 connector, not the cable that it carries.

NE was suggested by Meta.

  • You've already answered your own question... if it were a standard, everyone would be making the same thing -- the thing spelled out in the standard. That's not the case -- there are hundreds of different (patented even!) ways to protect the "RJ45" (RJ48/8P8C) connector.
    – Ricky
    Nov 30, 2022 at 20:47

1 Answer 1


IEEE 802.3 twisted-pair Ethernet uses the 8P8C modular connector standardized in IEC 60603-7. The "RJ45" name is almost ubiquitous but there's no official standard of that name. There's only an RJ45S registered jack (keyed 8P2C) that's wired differently.

Any modifications, protective boot, shroud, bend protection etc. are not standardized by IEEE or IEC, but they may be present in industrial or military standards.

You can get the full Ethernet specs on the IEEE GET page (free after registration). Sadly, IEC standards are not freely available.

  • As mentioned in the question, I am referring to the connector only, not the cable. Nov 30, 2022 at 15:59
  • Me neither. ;-)
    – Zac67
    Nov 30, 2022 at 16:01
  • Then why are you talking about the Ethernet standards? Nov 30, 2022 at 16:03
  • 2
    Since "RJ45" isn't really specified anywhere short of what's in common use, I'd venture that "RJ45" implies Ethernet use. The generic term is 8P8C. However, any other use than for networking is off topic here, so if you're after the mechanical/electrical details, Electrical Engineering might be a better site to ask.
    – Zac67
    Nov 30, 2022 at 16:44
  • 2
    For all you trivia buffs, the designation Registered Jack 45 (S) was created by Bell Labs to specify a standard connector for modem and data interfaces. The specific type has a "key" to prevent other use, and has different wiring than what is used today. But the name stuck, just like the "Return" key on your keyboard. Here's more info.
    – Ron Trunk
    Nov 30, 2022 at 20:43

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