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Joined: Jan 2005
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,378 Likes: 13 |
That's it, Jeff in PA (there are two Jeffs in this thread). Yes, these were six-conductor modular plugs/jacks where the plug's finger clip was at the right side instead of the center of the plug/jack. It was impossible to plug these cords into an NON-DEC jack or vice-versa.
I only did one installation that involved this system. It was very, very short-lived.
Ed Vaughn, MBSWWYPBX
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Joined: Jun 2005
Posts: 204
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I am not sure, but I think the S mean Shielded and the X means it has a shorting bar... so an RJ48S would use STP cable (shielded twisted pair) instead of UTP (un-shielded TP) cable. and an RJ48X would have a shorting bar so that when the plug is removed the shorting bars creat a loop-back condition (commonly used in T1 pigtails). an RJ31X is used by alarm systems so that when the alarm system is unplugged from the jack, the line still has dial tone. --- but don't quote me on any of this, It's almost four in the morning and I'm on NyQuil (Vicks Nite Time cold actually, but I couldn't resist  )
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Joined: Dec 2006
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Ed
I would have uploaded a graphic of the MMJ but either can't or don't know how. :scratch:
Anyhow, since I'm not a true 'phoneguy' I always refered to the MMJ as an offset type connector.
Jeff (in PA)
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Joined: Jan 2005
Posts: 15,378 Likes: 13
Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,378 Likes: 13 |
The MMJ's came and went so quickly that I don't know if they picked up too many nicknames.
Ed Vaughn, MBSWWYPBX
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Joined: Dec 2002
Posts: 9,423 Likes: 1
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I only saw them in use once. At a BJ's Wholesale Club I noticed them on the back of the computer terminals.
Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Dec 2002
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Jeff Moss
Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
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Joined: Dec 2006
Posts: 123
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From Wikipedia: Naming confusion
There is much confusion over these connection standards. The six-position plug and jack commonly used for telephone line connections may be used for RJ11, RJ14 or even RJ25, all of which are actually names of interface standards that use this physical connector. The RJ11 standard dictates a 2-wire connection, while RJ14 spells out a 4-wire configuration, and RJ25 uses all six wires.
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