Two-line phone system; Converting telephone wall outlets; Installing machine, external two-line TAD and two-line telephone- Page 65

Brother MFC-8870DW User's Guide

Table of Contents

USER’S GUIDE MFC-8460N/MFC-8660DN/MFC-8670DN/MFC-8860DN/MFC-8870DW
Section II: Fax
Section V: Appendixes
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Phone services and external devices

51

7

Two-line phone system

7

A two-line phone system is nothing more than 
two separate phone numbers on the same 
wall outlet. The two phone numbers can be 
on separate jacks (RJ11) or combined into 
one jack (RJ14). Your machine must be 
plugged into an RJ11 jack. RJ11 and RJ14 
jacks may be equal in size and appearance 
and both may contain four wires (black, red, 
green, yellow). To test the type of jack, 
plug in a two-line phone and see if it can 
access both lines. If it can, you must separate 
the line for your machine. (See 

Easy Receive

 

on page 42.)

Converting telephone wall outlets

7

There are three ways to convert to an RJ11 
jack. The first two ways may require 
assistance from the telephone company. You 
can change the wall outlets from one RJ14 
jack to two RJ11 jacks. Or, you can have an 
RJ11 wall outlet installed and slave or jump 
one of the phone numbers to it.

The third way is the easiest: Buy a triplex 
adapter. You can plug a triplex adapter into 
an RJ14 outlet. It separates the wires into two 
separate RJ11 jacks (Line 1, Line 2) and a 
third RJ14 jack (Lines 1 and 2). If your 
machine is on Line 1, plug the machine into 
L1 of the triplex adapter. If your machine is on 
Line 2, plug it into L2 of the triple adapter.

 

Installing machine, external two-line 
TAD and two-line telephone

7

When you are installing an external two-line 
telephone answering device (TAD) and a 
two-line telephone, your machine must be 
isolated on one line at both the wall jack and 
at the TAD. The most common connection is 
to put the machine on Line 2, which is 
explained in the following steps. The back of 
the two-line TAD must have two telephone 
jacks: one labeled L1 or L1/L2, and the other 
labeled L2. You will need at least three 
telephone line cords, the one that came with 
your machine and two for your external two-
line TAD. You will need a fourth line cord if 
you add a two-line telephone.

Place the two-line TAD and the two-line 
telephone next to your machine.

Plug one end of the telephone line cord for 
your machine into the L2 jack of the triplex 
adapter. Plug the other end into the LINE jack 
on the back of the machine.

Plug one end of the first telephone line cord 
for your TAD into the L1 jack of the triplex 
adapter. Plug the other end into the L1 or 
L1/L2 jack of the two-line TAD. 

Plug one end of the second telephone line 
cord for your TAD into the L2 jack of the two-
line TAD. Plug the other end into the EXT. 
jack on the left side of the machine.

 

1 Triplex Adapter
2 Two Line Phone
3 External Two Line TAD
4 Machine

RJ14

RJ11

RJ14

1

2

3

4

Detailed Information for Brother MFC-8870DW User's Guide

Lists of information found in Brother MFC-8870DW User's Guide - Page 65

  • 42.) Converting telephone wall outlets 7 There are three ways to convert to an RJ11 jack.
  • 2. You will need at least three telephone line cords, the one that came with your machine and two for your external two- line TAD.

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