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Phone System Installation




On the Phone System Side





Do you have a connector like this that brings the telephone company lines into your phone system? These are RJ-21 connectors, the most common connector used on medium sized phone systems.


This a 66-Clip M-Block with an RJ-21 plugged in on the left side. This is typical of what is found in a phone room. The other end of the RJ-21 cable that is pluged into your phone system look similar to this.


These are RJ-21 to RJ-12/RJ-14 Breakout Boxes

The one on the left will breakout 10 phone lines, 2 phone line per RJ-14 Jack.
You would run an RJ-14 (4 conductor) wires from each jack to the odd numbered ports on the Identifier.

The one in the middle has 25 RJ-12 connectors. You would run one RJ-12 wire for each phone line to the Identifier.

The one on the right is wired RJ12 and RJ14. You would run 2 phone lines on each wire to the Identifier.

The Identifier will accept the either RJ-12 (one phone line per wire) or RJ-14 with 2 linea per wire.


An RJ-21 Cable

Uplug the RJ-21 from your phone system and plug it into the Breakout box. Then connect the RJ-21 cable from the Breakout Box to the phojne system. Then run RJ-14 modular wires from the Breakout Box to the Identifier.

The phone lines going to the Identifier
can be either RJ-12 or RJ-14

These are the Standard Modular Plugs
that are used on all plain old telephones.


An RJ-12 Plug has 2 conductors, an RJ-14 has 4 conductors
The Green and Red pair are line 1, the Yellow and Black line 2.


The prefered method is to use RJ-14 with 2 phone lines per wire.

The Identifer connects the second line on the RJ-14 wire to the next even number phone line port.