I guess someone should point out that RJ11 plugs can be inserted into RJ45
jacks without any alignment or reliability issues. I have been using this
fact for my sensor assemblies for quite some time now. I have a number of
sensors that are wired with RJ11 but I patch them together with a little bay
made out of a row of RJ45 jacks liberated from a 12-port ethernet hub.
I use the RJ11 wiring standard published by Maxim and used by the DS9490R -
http://datasheets.maxim-ic.com/en/ds/DS9490-DS9490R.pdf. There are 6 pins
but they only use pins 1-4 for useful purposes so I take advantage of that
fact by wiring my sensors with 4-conductor telephone cable inserted
off-centre into 6pin RJ11 phone plugs so that pins 1-4 are connected and
pins 5,6 are nc.
Works well and allows for ordinary (cheap) 6-conductor telephone plugs,
jacks, and adaptors to be used. But you have to beware of cheapie telephone
adaptors that only connect two or four of the six pins. It's usually quite
obvious because the gold spring contacts just aren't there for the pins that
aren't connected. The 2-pair ones use the middle pins 2-5 so we need
genuine 3 pair ones even if we aren't using two of the pins.
On Sat, Nov 15, 2008 at 09:21, Gregg C Levine <
[EMAIL PROTECTED]> wrote:
> Hello!
> I've made cables as well. I got into the habit when I discovered that the
> basic phone cable, as the ones from RS (From which I bought my connecters
> and the crimper) were wired reversed. That is one connector was installed
> upside down from the other.
>
> I keep my one-wire cables separate from the ones designated as phone wire
> only cables. It also happens that Jameco, (www.jameco.com) at one time had
> in their catalog a description of the different styles behind how to wire
> an
> RJ11 cable.
>
> Please note, Paul, and Donald, that there are two distinct styles regarding
> the RJ45. One includes Ethernet and has the eight leads wired straight
> through, and one includes the phones that roost on office desks, and they
> do
> not have straight through wiring, unless that one is a VOIP service phone.
>
> Now if one of our members is interested in a conversion box that translates
> the one-wire connection from the USB fob that Maxim sells, to an RJ45;
> itself also wearing a one-wire device, namely a DS2401, then I am
> interested.
>
> Fees for such a beast are negotiable, it will probably include the cost of
> materials, and shipping, but not the costs for my time and labor.
> --
> Gregg C Levine [EMAIL PROTECTED]
> "The Force will be with you always." Obi-Wan Kenobi
>
> -----Original Message-----
> From: Paul Alfille [mailto:[EMAIL PROTECTED]
> Sent: Saturday, November 15, 2008 9:31 AM
> To: [email protected]
> Subject: Re: [Owfs-developers] RJ11 to RJ45 Cable
>
> I've made cables. There are two sizes of modular plugs, the telephone
> size(RJ-11), and the ethernet size(RJ-45). The Telephone size can link up
> to
> 6 wires, but standard telephones use only 1 or 2 pairs, and cross over the
> pairs which can make off-the-shelf cables tricky. I've taken to marking the
> ends of my straight-through RJ11 cables to distiguish them from telephone
> cables.
>
> RJ45 is almost always straight-thru, thank goodness, and always have all 8
> wires connected. Not all 1-wire devices have an RJ45 female port, many use
> the smaller RJ11 size. I hope that we'll switch to all rj45 in the future,
> the incremental cost is truly negligable, and buying off-the-shelf cables
> is
> a big win!
>
> Now if you are noting the the wires, themselves, don't fit in the crimp-on
> rj11 connector, that's happened to me. There are different designs for
> those
> connectors that give more or less room. Quite a nuisance.
>
> Paul Alfille
> On Fri, Nov 14, 2008 at 10:19 PM, Donald J. Organ IV
> <[EMAIL PROTECTED]> wrote:
> Has anyone made their own RJ11 to RJ 45 cable??
>
> I notice that this needs to be a 6 pin connector so I went to the store and
> purchased 6 pin adpters however the end seems like its too big....has
> anyone else had this experience??
>
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