Talkswitch owner friendly Specifications Manual - page 12
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V S H A R D W A R E S P E C I F I C A T I O N G U I D E
H O M E / O FF I CE W I R I NG I N S T R UC T I O N S
This section describes phone wiring for North America, and is provided as reference information for other
countries and regions.
BASIC RESIDENTIAL PHONE WIRING
Looped wiring
Loop wiring is common in most residential houses. The demarcation point (see next page) breaks the
incoming phone lines into ‘loops’ that can run the length of the entire house, but are often broken into
smaller loops that serve different areas of the house.
All houses have at least one telephone line, however it is also common to have two or more incoming phone
lines. Whether you are wiring single, dual or multiple lines, you will still be using phone cord with four
wires. How each phone jack is wired to the loops will determine if the phone jack is on Line 1 or Line 2.
This document describes single- and two-line wiring configurations. Many of the processes can also be
applied to multi-line wiring.
Single-line wiring
For a single telephone line, all phones in the building will usually be wired
using the RED and GREEN wires of the phone cord. The other two wires,
BLACK and YELLOW, are not used.
The demarcation point connects the incoming RED and GREEN pair to
various loops within the building. It is probable that the building is also
wired with a BLACK and YELLOW pair, however these are not connected to
any wall jacks.
Two-line wiring
Two incoming phone lines are denoted in pairs, usually the RED and GREEN
are used as Line 1, and the BLACK and YELLOW are Line 2. All four wires are
looped throughout the building so that each jack has access to Line 1 and
Line 2. How each jack is connected to the RED, GREEN, BLACK, and YELLOW
wires determines if it is connected to Line 1, Line 2, or both.
UNITED KINGDOM — To connect telephones with BT style plugs, it is recommended that extensions are
wired through a master socket or an in-line adapter with a capacitor. This also ensures compatibility
with some telephones that require 3-wire connections for the telephone to ring.