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CHAPTER 3: Installing the DRD-4
3.3 Installing the DRD-4 on Two
Lines with Single-Line and Two-Line
Phones (with the DRD-4 connected
to one extension)
This arrangement typically occurs in
homes with a primary line
(residence number) and a private
business line (home business
number). Both lines may be
accessible by any number of
extension phones.
NOTE: If you have two lines but only one
phone can access line two (the
business line), use the single-line
Installation procedure described
Section 3.1. If you have two lines
and a two-line phone, use the
Installation procedure described in
this section.
For this procedure, you will need
two three-way adapters, which you
can purchase from any telephone or
electronic equipment dealer. See
Fig. 3-3 for a close-up of the three-
way adapter. See Fig. 3-4 for an
illustration of the installation.
EXTENSION PHONES
TEL
LINE-IN
STYLE 1
STYLE 2
STYLE 3
STYLE 4
OLD
OLD
NEW
Fig. 3-2. Installing the DRD-4 on a Single-Line, Multiple-Phone System
Maintaining Exclusion.
L1
L2
L1+L2
Fig. 3-3. A Three-Way Phone
Adapter.
