RE: [SI-LIST] : Ethernet RJ-45 connectors

About this list Date view Thread view Subject view Author view

From: Larry Miller ([email protected])
Date: Wed Jul 05 2000 - 13:44:43 PDT


I learn something new every day. Well, almost every day.

Thanks, Doug.

Larry Miller

> -----Original Message-----
> From: Doug McKean [SMTP:[email protected]]
> Sent: Wednesday, July 05, 2000 12:05 PM
> To: SI - List Discussion Group
> Subject: Re: [SI-LIST] : Ethernet RJ-45 connectors
>
> Jan Vercammen wrote:
> >
> > -4- one category 5 RJ-45 connector drawing carried the following
> statement: "jack
> > cavitiy conforms to FCC rules and regulations, part 68 subpart F". I
> assume that
> > this is related to safety and isolation voltages?
>
> I'll just footnote Larry's excellent comments
> with a couple of comments.
>
> FCC Part 68 deals with connection to the telephone line.
> An RJ-45 connector can provide that. If you are using the
> RJ-45s for strictly Ethernet, you've nothing to worry about
> from Part 68. That note is when the connectors are used
> for telephone purposes.
>
> In regards to safety and isolation voltages, yes you
> are correct. The "spirit" of the Part 68 is to protect
> the line AND the user in terms of catastrophic failure.
>
> It protects the line from attached equipment whereby
> some catastrophic failure primary voltages inside the
> device are crossed over to the telephone line.
>
> It protects the user the other way round. A catastrophic
> failure in this sense is also a a crossed line condition.
> A car could knock down a pole causing street power to
> cross over to the telephone line and thus the user.
>
> - Doug
>
> **** To unsubscribe from si-list or si-list-digest: send e-mail to
> [email protected]. In the BODY of message put: UNSUBSCRIBE
> si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> si-list archives are accessible at http://www.qsl.net/wb6tpu
> ****
>

**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected]. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Wed Nov 22 2000 - 10:50:45 PST