RJ-45 Breakout Box?

I seem to not have been clear.

I'm working on a telephony application, and I want to dink with tip and ring. I want a break out box that's just like serial break out boxes, only it uses modular connectors -- AKA "telephone" connectors, AKA RJ-45.

Thanks again.

You didn't say how many pins the modular connector might have. If you know someone who does a lot of Cisco equipment, they may have a 9-pin to modular RJ-45 adapters laying around. Whether or not it has the pinout you want is another matter, because there's no real standard for the pinout.

There is no standard pinout for RS232 on 8P8C connectors, so it is unlikely someone will produce such box. You can still get (proprietary) adapters for the DB-9 or DB-25 to 8P8C, which, combines with a "regular" breakout box, will get you what you are looking for. Check Internet for AT&T 355 adapter or equivalents. Or simply get a customizable adapter and invent your own pinout. Just make sure it's the same (or cross-over if you need it) on both ends.

Not a 'breakout' box as such, but quite a few people do DB9 plug housings with a RJ45 socket, and the pins left loose, so you just plug the wires into the required pins on the DB9, and screw the cover on. In the UK, from RS electronics, they are part number 382-2689, and you can look at these on their web page.

Best Wishes

Well, it appears that there are actually _two_ fairly popular standards. EIA/TIA 561 is one, and the ""Yost Serial Device Wiring Standard" is often found on Unix systems. The two are, alas, quite incompatible.

One advantage of the Yost standard is that it presents the same data-in and data-out positions on the RJ45 for all devices... the differences between DCE and DTE are taken care of in the DB-whatever-to- RJ45 connector. With Yost, you can connect any device to any other with the same cable.

I agree, the O.P. will very probably have to build a breakout box with whatever RJ45 pinout is desired.

make a

but

and

boxes,

RJ-45.

already. :-)

maybe a

socket. ;-)

No, no, no! Real Telephone Techs don't use pin headers, etc. Real Telephone Techs use a 66 block to do their 'patching'. That and a hank of telephone wire is all any real telephone tech ever needed. You can get a 66 block with RJ-45 connectors on the side. But the RJ-45 is not a telephone connector, it's for T1 or modems or ISDN. You only need two wires for tip and ring, not eight wires! What you really need is a 6 position, 2, 4, or 6 conductor jack and plug, commonly known as RJ-11 or RJ-14 or RJ-25.