Appendix H: Home/Office Wiring Guide - Talkswitch CT.TS005.003904 User Manual

A P P E N D I X H
A pp e n di x H : H o me /O ffi ce W i r i ng Gu i de
HOME/OFF ICE WIRING GUIDE
This appendix 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
Two-line wiring
H O M E / O F F I C E W I R I N G G U I D E
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 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.
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