Using CAT5 Modular Jack w/ Phone

June 20, 2009 at 14:01:19
Specs: Win XP Pro SP1a, 2.8 GHz / 1 GB PC270
I have a bunch of left over modular jacks from work and would like to use them at home but the problem is, at home we didn't use CAT5, we used standard phone cable.

Is it possible to use the modular jacks?


Regular Phone Cable:

Modular Jacks:

See More: Using CAT5 Modular Jack w/ Phone

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June 20, 2009 at 15:59:35
Take your pick buy phone jacks or make custom phone cables.
RJ-11/12 does not fit into RJ-45.

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June 21, 2009 at 05:38:27
Actually, wizard-fred, you have that backwards. An RJ-45 plug will not fit into an RJ-11 outlet. An RJ-11 will fit into an RJ-45 outlet.

So, if you want to use RJ-45 plugs, you would have to have RJ-45 outlets in your walls. If you don't have RJ-45 outlets in your walls, you'll have to use RJ-11's

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June 21, 2009 at 19:53:52
I know that you can use RJ11 jacks in a RJ45, that wasn't the question. I was asking how you wire it up.

EDIT: This may be what I was looking for:

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Related Solutions

June 21, 2009 at 23:46:02
RJ-11/12 plugs fit into RJ-45 jacks but not correctly. Sometimes
their removal requires a lot of effort. The phones use the two
middle connection 3 & 4 for line 1, 2 & 5 for line 2

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June 22, 2009 at 13:04:41

While I agree that you could save $4 on this deal, you run the risk of other issues.

Just go out an get the correct jacks and plugs and wire it standard.

"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

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