TELECOM Digest OnLine - Sorted: Re: USB to RJ-45 Console Cable?

Re: USB to RJ-45 Console Cable?

Neal McLain (
Thu, 07 Apr 2005 22:48:35 -0500

JXM2119 <> wrote:

> I would like to buy/make a cable that will have a USB
> connector on one end and an RJ-45 on the other.

I wrote:

> If by "RJ-45" you mean an 8-position modular connector
> wired to carry an Ethernet circuit, you'll need an
> adapter such as Planet Technology Corp. Model PT9500. I
> have two of these devices in service, connecting oldish
> PCs (W98) to a Linksys router. They work great.

James Carlson <> wrote:

> RJ-45 connectors are also commonly used for all sorts of
> serial links -- including async (using RS-232 levels),
> sync (often RS-422), and even telecom (such as DS-1).
> It's not just Ethernet.

JXM2119 didn't tell us what kind signal s/he's using. I inferred
Ethernet from the context of the question; if s/he has some other
signal in mind, perhaps s/he should let us know.

I agree that 8-position modular connectors can be wired for things
other than Ethernet; that's why my response to the original question
began with the word "if." But I don't agree with the use of the term
"RJ-45" to identify a connector. RJ45 is a USOC (albeit apparently
obsolete); not a connector.

Neal McLain

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