How would I convert RJ11 into CAT-5e?

Question

I have a telephony modem that we just installed and I need to convert from standard RJ11 connector to a CAT-5 cable, our board that splits the phone line is wired all into CAT-5. I have a separate way to split my data into the CAT-5's, I just need to figure out how to split the voice up. Thanks.

Answer 1

RJ-45 and the CAT-5 is the same thing!!

http://www.lanshack.com/make-cat5E.aspx

Answer 2

You are mixing two different types of terminology.  RJ 11 or 12 and RJ45 are types of modular connectors for jacks.  An RJ11 is for two pair wire (4 connectors), and RJ 12 is for three pair wire (6 connectors) and an RJ45 (8 connectors) is for four pair wire.  Category 5 and 5e are types of cable and the numbers depict the data speed transmission the cable will carry.  Category 3 cable is voice grade while Cat 5, 5e and 6 are data grade.  The higher the number the better the data transmission.

Answer 3

We seem to be fighting a losing battle in the correct use of terminology, but the modular connectors used for Ethernet are NOT properly designated RJ45.    In fact they aren't RJ-anything.

RJ stands for "Registered Jack," and the designations originated in the 1970s in the Bell System as a means to clearly identify specific wiring configurations for phone service.  The numbers refer to a specific combination of both modular plug/jack style AND its method of wiring.    Both RJ11 and RJ14 use the same size plugs, for example, but RJ11 is single-pair for one phone line while RJ14 is a 2-pair connection for two lines.

Since these are TelCo designations, Ethernet has never been part of the system.  For some reason, "RJ45" has been hijacked to refer to the 8-way modular plugs on computer networks, despite the fact that a true RJ45 connection was in fact for a modem with adjustable transmission level, and doesn't even use the same type of plug as Ethernet.

Answer 4

you dont. cat5 is an rj45 for a reason. rj11 is good for voice.

if you must run voice and data in the same utp run, the use the conventional rj45/cat5e config, but pull out you white/brown pair and punch it down onto a rj11 keystone jack.

the white/brown is spare in all configurations