MMJ cable length?
kth at srv.net
Mon Nov 27 11:08:13 CST 2006
> I was thinking about putting together some standard MMJ cables, but I
> realized I didn't know what the standard lengths were. Can anyone tell
> me which were the most common/useful lengths for the original DEC
> cables? I've seen and use cables as short as 18" and as long as 50ft.
> I've used a lot of them that were somewhere in the 12-15ft range, but
> I'm not sure what length would be the most versatile.
The 5-6' cables were probably the most common, but
you could go up to about 300' if you ran it at a slow
enough speed. Avoid outside runs as much as
possible (lightning damage can be very impressive).
It really depends on the enviornment you are in on how
long your average cable will be. If you are setting up
a terminal room, you will probably use short cables.
If you are setting up in an office enviornment, you will
probably want to wire the walls, and place MMJ jacks
on the wall. Then you will need to have cables long
enough to reach from the wall to the desk (5' to 20'),
depending on weither they are willing to have their desk
against the wall with the jacks.
I wired up a lot of long runs from a computer room to
individual offices, and you cannot get the cable through
an existing wall with the ends attached. They almost
always get trashed on the way through the wall, or get
hung up on the way through.
Later on, I used regular CAT-5 connectors on the
wallplates, and wired cables up as CAT5-MMJ to
the terminals. This allowed for later transition to a
network, as wll as using easier to find CAT5 wallplates.
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