MMJ Stranded

For those who don't know. MMJ is an offset locking tab modular connector that looks similar to an RJ-12 phone cord plug. It has 6 pins. Stranded type pins puncture the connectors through the center, and solid type pins skin the insulation off the sides. If you have good eyes or good reading glasses and plastic isn't to fogged and scratched from riding around in a box in your truck you can see the difference through the plastic.

Its looking like I am going to have to make an adaptor of some kind. Digi-Key and MCM don't even have them.

ont-email.me...

may try here

Thank you. Now to find out if the one they have is for stranded or solid wire... or if they know the difference.

Just sent them a message.

For those who don't know. MMJ is an offset locking tab modular connector that looks similar to an RJ-12 phone cord plug. It has 6 pins. Stranded type pins puncture the connectors through the center, and solid type pins skin the insulation off the sides. If you have good eyes or good reading glasses and plastic isn't to fogged and scratched from riding around in a box in your truck you can see the difference through the plastic.

The Problem:

1. If you use a penetrating stranded wire type on solid wire you risk it breaking the conductor and having a bad connection.

1. If you use a skinning type solid wire type on stranded wire you risk the conductor just forming an oval and slipping between the skinning points and having a bad connection or even no connection.

What are they used for?

Try this outfit i get many cables and connectors thru them

They are used where you want a quick modular connection, but don't want people to be able to plug a phone into it. In this case they are on the end of the cable for a wired remote for a multiplexer.

Ah, clever. Never heard of that method. ;)

Thanks. I've always used the rs485 box/cord that comes with the PTZ controller, it never dawned on me someone could try to plug a phone in it!

The DECconnect Modified Modular Jack (MMJ) is a variation of the 6P6C modular connector and was developed by Digital Equipment Corporation. The main difference from the conventional modular connector is that the hook is toward the side instead of the center of the plug, making it impossible to insert a standard modular cable plug such as those used telephone or Ethernet applications. MMJ connectors are used on Digital minicomputers, such as the PDP-11, VAX and Alpha based machines and to connect terminals, printers or serial console servers.

The six conductors of the DECconnect MMJ connector are used for the main signals in RS-423 serial communication: Tx and Rx for the data transmission and DSR and DTR for handshaking. The transmit and receive signals are differential, i.e. each signal is the voltage difference between two conductors, as opposed to a voltage on a single connector relative to a common reference. But one can in practice wire these signals to an RS-232 device, which uses the common reference method, by combining the lower voltage sides of each signal to the RS-232 signal ground line. For this type of connection there are a number of models of conversion adapter.

When connecting two DTE devices such as a computer and a printer, the Digital BC16E crossover cable is used.

I was about ready to just make some jack and cord adaptors to use the solid wire MMJs I have when a little gold magic bag appeared in my mail box. I closed my eyes and wished for stranded wire MMJ connectors. I opened the draw string on the magical little gold bag. Several little stranded wire MMJs tumbled out on my desk.... Along with a steel 1943 penny, a USB card reader, and a power connector for an iPod. Weird.

Anybody need an iPod cord, or a USB SD card reader? The money I am keeping. Sorry.

Sounds like you hit the jackpot!! Congrats!!!

Sounds to me like a job by the MMJ fairy!

HEY! HE CALLED YOU A FAIRY!

Tinker Bell would be proud.

Jeeeze .... ya gotta be so frickin politically correct nowdays. I take it back already.

So mmmm ..... lets see .... maybe it was the MMJ ... Elf ..... OK?

I heard that Santa was a Elf..............................

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I heard that he was Jewish!